LibreLogo Toolbar - LibreOffice Help https://help.libreoffice.org/index.php?title=Writer/LibreL...
LibreLogo Toolbar
From LibreOffice Help EN AST BG BN BN-IN CA CS DA DE EL ES EU FI FR HU IT JA KM KO NB NL OM PL PT PT-BR RU SL SV TR VI ZH-CN ZH-TW
LibreLogo is a simple, localized, Logo-like programming environment with turtle vector graphics for teaching of computing (programming and word processing), DTP and graphic design. See http://www.numbertext.org/logo/librelogo.pdf.
Contents
1 LibreLogo toolbar 2 Turtle moving icons 3 Start Logo program 4 Home 5 Clear screen 6 Program editor/Syntax highlighting/Translating 7 Command line 8 Graphical user interface of basic turtle settings 9 Program editing 10 LibreLogo programming language 10.1 Differences from the Logo programming language 10.2 Other features of LibreLogo 11 LibreLogo commands 11.1 Basic syntax 11.1.1 Case sensitivity 11.1.2 Program lines 11.1.3 Comments 11.1.4 Break program lines to multiple paragraphs 11.2 Turtle moving 11.2.1 FORWARD (fd) 11.2.2 BACK (bk) 11.2.3 LEFT (lt) 11.2.4 RIGHT (rt) 11.2.5 PENUP (pu) 11.2.6 PENDOWN (pd) 11.2.7 POSITION (pos)
1 of 24 13/06/2016 18:24 LibreLogo Toolbar - LibreOffice Help https://help.libreoffice.org/index.php?title=Writer/LibreL...
11.2.8 HEADING (seth) 11.3 Other turtle commands 11.3.1 HIDETURTLE (ht) 11.3.2 SHOWTURTLE (st) 11.3.3 HOME 11.3.4 CLEARSCREEN (cs) 11.3.5 FILL and CLOSE 11.4 Pen settings 11.4.1 PENSIZE (ps) 11.4.2 PENCOLOR/PENCOLOUR (pc) 11.4.3 PENTRANSPARENCY 11.4.4 PENCAP/LINECAP 11.4.5 PENJOINT/LINEJOINT 11.4.6 PENSTYLE 11.5 Fill settings 11.5.1 FILLCOLOR/FILLCOLOUR (fc) 11.5.2 FILLTRANSPARENCY 11.5.3 FILLSTYLE 11.6 Drawing objects 11.6.1 CIRCLE 11.6.2 ELLIPSE 11.6.3 SQUARE 11.6.4 RECTANGLE 11.6.5 POINT 11.6.6 LABEL 11.6.7 TEXT 11.7 Font settings 11.7.1 FONTCOLOR/FONTCOLOUR 11.7.2 FONTFAMILY 11.7.3 FONTSIZE 11.7.4 FONTWEIGHT 11.7.5 FONTSTYLE 11.8 PICTURE (pic) 11.8.1 Shape grouping 11.8.2 Starting new line shapes 11.8.3 Saving SVG images 11.8.4 Saving SVG/SMIL animations (drawings with SLEEP commands) 11.8.5 Consistency at the left border 11.9 Loops 11.9.1 REPEAT 11.9.2 REPCOUNT 11.9.3 FOR IN
2 of 24 13/06/2016 18:24 LibreLogo Toolbar - LibreOffice Help https://help.libreoffice.org/index.php?title=Writer/LibreL...
11.9.4 WHILE 11.9.5 BREAK 11.9.6 CONTINUE 11.10 Conditions 11.10.1 IF 11.10.2 AND, OR, NOT 11.11 Subroutines 11.11.1 TO, END 11.11.2 OUTPUT 11.11.3 STOP 11.12 Default variables 11.12.1 ANY 11.12.2 TRUE 11.12.3 FALSE 11.12.4 PAGESIZE 11.12.5 PI/π 11.13 Input/Output 11.13.1 PRINT 11.13.2 INPUT 11.14 SLEEP 11.15 GLOBAL 11.16 Functions 11.16.1 RANDOM 11.16.2 INT 11.16.3 FLOAT 11.16.4 STR 11.16.5 SQRT 11.16.6 SIN 11.16.7 COS 11.16.8 LOG10 11.16.9 ROUND 11.16.10 ABS 11.16.11 COUNT 11.16.12 SET 11.16.13 RANGE 11.16.14 LIST 11.16.15 TUPLE 11.16.16 SORTED 11.16.17 SUB 11.16.18 SEARCH 11.16.19 FINDALL 11.16.20 MIN 11.16.21 MAX
3 of 24 13/06/2016 18:24 LibreLogo Toolbar - LibreOffice Help https://help.libreoffice.org/index.php?title=Writer/LibreL...
11.17 Color constants
LibreLogo toolbar
The LibreLogo toolbar (View » Toolbars » Logo) contains turtle moving, program start, stop, home, clear screen, program editor/syntax highlighting/translating icons and an input bar (command line).
Turtle moving icons
They are equivalents of the Logo commands “FORWARD 10”, “BACK 10”, “LEFT 15”, “RIGHT 15”. Clicking on one of the icons will also focus the turtle shape scrolling the page to its position.
Start Logo program
Click on the icon “Start Logo program” to execute the text (or only the selected) text of the Writer document as a LibreLogo program. In an empty document an example program will be inserted and executed.
Click on the icon “Stop” to stop the program execution.
Home
Click on the icon “Home” to reset the position and settings of the turtle.
Clear screen
Click on the icon “Clear screen” to remove the drawing objects of the document.
Program editor/Syntax highlighting/Translating
The “magic wand” icon sets 2-page layout for program editing, expands and converts to uppercase the abbreviated, lowercase Logo commands in the Writer document. Change the language of the document (Tools » Options » Language Settings » Languages » Western) and click on this icon to translate the Logo program to the selected language.
Command line
4 of 24 13/06/2016 18:24 LibreLogo Toolbar - LibreOffice Help https://help.libreoffice.org/index.php?title=Writer/LibreL...
Hit Enter in the command line to execute its content. To stop the program use the icon “Stop”.
Hold down the Enter to repeat the command line, for example, on the following command sequence:
FORWARD 200 LEFT 89
To reset the command line click triple in it or press Ctrl-A to select the previous commands, and type the new commands.
Graphical user interface of basic turtle settings
Turtle shape of LibreLogo is a normal fixed size drawing object. You can positionate and rotate it on standard way, too, using the mouse and the Rotate icon of the Drawing Object Properties toolbar. Modify Line Width, Line Color and Area Color settings of the turtle shape to set PENSIZE, PENCOLOR and FILLCOLOR attributes of LibreLogo.
Program editing
LibreLogo drawings and programs use the same Writer document. The LibreLogo canvas is on the first page of the Writer document. You can insert a page break before the LibreLogo programs and set page zoom using the “magic wand” icon of the Logo toolbar, also change the font size for a comfortable 2-page layout for LibreLogo programming: left (first) page is the canvas, right (second) page is the LibreLogo program editor. LibreLogo programming language
LibreLogo is an easily localizable, Logo-like programming language, localized in several languages by LibreOffice native language communities. It is back-compatible with the older Logo systems in the case of the simple Logo programs used in education, eg.
TO triangle :size REPEAT 3 [ FORWARD :size LEFT 120 ] END
triangle 10 triangle 100 triangle 200
5 of 24 13/06/2016 18:24 LibreLogo Toolbar - LibreOffice Help https://help.libreoffice.org/index.php?title=Writer/LibreL...
Differences from the Logo programming language
List members are comma separated: POSITION [0, 0] Program blocks and lists are different Program blocks need space or new line at parenthesization: REPEAT 10 [ FORWARD 10 LEFT 36 ] Lists need close parenthesization: POSITION [0, 0], and not POSITION [ 0, 0 ]
1-line function declarations are not supported (TO and END need new lines).
Other features of LibreLogo
The colon is optional before the variable names. TO triangle size REPEAT 3 [ FORWARD size LEFT 120 ] END String notation supports also orthographical and Python syntax. PRINT "word ; original Logo syntax PRINT “Arbitrary text.” ; orthography, Writer PRINT 'Arbitrary text.' ; Python syntax Python list and string handling PRINT “text”[2] ; print “x” PRINT “text”[1:3] ; print “ex” Python-like FOR loop Python-like variable declaration: x = 15 PRINT x There are no extra query functions: PRINT FILLCOLOR p = POSITION PRINT p REPEAT 10 [ POSITION ANY POSITION p ] Alternative parenthesization in function calls TO star size color FILLCOLOR color REPEAT 5 [ LEFT 72 FORWARD size RIGHT 144 FORWARD size ] FILL END
star 100 “red” star (100, “green”)
6 of 24 13/06/2016 18:24 LibreLogo Toolbar - LibreOffice Help https://help.libreoffice.org/index.php?title=Writer/LibreL...
star(100, “blue”) LibreLogo commands
Basic syntax
Case sensitivity
Commands, color constants are case insensitive:
PRINT “Hello, World!” print “Hello, World, again!”
Variable names are case sensitive:
a = 5 A = 7 PRINT a PRINT A
Program lines
Lines of a LibreLogo program are paragraphs in the LibreOffice Writer document. A program line can contain multiple commands:
PRINT “Hello, World!” PRINT “LibreLogo”
Comments
Lines or line parts are comments from a semicolon to the end of the line (paragraph):
; some comments PRINT 5 * 5 ; some comments
Break program lines to multiple paragraphs
It’s possible to break a program line for more paragraphs using the character tilde at the end of the line:
PRINT “This is a very long ” + ~ “warning message”
7 of 24 13/06/2016 18:24 LibreLogo Toolbar - LibreOffice Help https://help.libreoffice.org/index.php?title=Writer/LibreL...
Turtle moving
FORWARD (fd)
FORWARD 10 ; move forward 10pt (1pt = 1/72 inch) FORWARD 10pt ; see above FORWARD 0.5in ; move forward 0.5 inch (1 inch = 2.54 cm) FORWARD 1" ; see above FD 1mm FD 1cm
BACK (bk)
BACK 10 ; move back 10pt
LEFT (lt)
LEFT 90 ; turn counterclockwise 90 degrees LEFT 90° ; see above LT 3h ; see above (clock position) LT any ; turn to a random position
RIGHT (rt)
RIGHT 90 ; turn clockwise 90 degrees
PENUP (pu)
PENUP ; turtle will move without drawing
PENDOWN (pd)
PENDOWN ; turtle will move with drawing
POSITION (pos)
POSITION [0, 0] ; turn and move to the top-left corner POSITION PAGESIZE ; turn and move to the bottom-right corner POSITION [PAGESIZE[0], 0] ; turn and move to the top-right corner POSITION ANY ; turn and move to a random position
HEADING (seth)
8 of 24 13/06/2016 18:24 LibreLogo Toolbar - LibreOffice Help https://help.libreoffice.org/index.php?title=Writer/LibreL...
HEADING 0 ; turn north HEADING 12h ; see above HEADING [0, 0] ; turn to the top-left corner HEADING ANY ; turn to a random direction
Other turtle commands
HIDETURTLE (ht)
HIDETURTLE ; hide turtle (until the showturtle command)
SHOWTURTLE (st)
SHOWTURTLE ; show turtle
HOME
HOME ; reset initial turtle settings and position
CLEARSCREEN (cs)
CLEARSCREEN ; remove drawing objects of the document
FILL and CLOSE
FILL ; close and fill the actual line shape or points CLOSE ; close the actual line shape or join the actual points
Example: filling a regular triangle:
FORWARD 50 LEFT 120 FORWARD 50 FILL
Example: drawing a regular triangle:
FORWARD 50 LEFT 120 FORWARD 50 CLOSE
Pen settings
PENSIZE (ps)
PENSIZE 100 ; line width is 100 points PENSIZE ANY ; equivalent of PENSIZE RANDOM 10
9 of 24 13/06/2016 18:24 LibreLogo Toolbar - LibreOffice Help https://help.libreoffice.org/index.php?title=Writer/LibreL...
PENCOLOR/PENCOLOUR (pc)
PENCOLOR “red” ; set red pen color (by color name, see color constants) PENCOLOR [255, 255, 0] ; set yellow color (RGB list) PENCOLOR 0xffff00 ; set yellow color (hexa code) PENCOLOR 0 ; set black color (0x000000) PENCOLOR ANY ; random color PENCOLOR [5] ; set red color (by color identifier, see color constants) PENCOLOR “invisible” ; invisible pen color for shapes without visible outline PENCOLOR “~red” ; set random red color
PENTRANSPARENCY
PENTRANSPARENCY 80 ; set the transparency of the actual pen color to 80%
PENCAP/LINECAP
PENCAP “none” ; without extra line end (default) PENCAP “round” ; rounded line end PENCAP “square” ; square line end
PENJOINT/LINEJOINT
PENJOINT “rounded” ; rounded line joint (default) PENJOINT “miter” ; sharp line joint PENJOINT “bevel” ; bevel line joint PENJOINT “none” ; without line joint
PENSTYLE
PENSTYLE “solid” ; solid line (default) PENSTYLE “dotted” ; dotted line PENSTYLE “dashed” ; dashed line
; custom dot–dash pattern specified by a list with the following arguments: ; – number of the neighbouring dots ; – length of a dot ; – number of the neighbouring dashes ; – length of a dash ; – distance of the dots/dashes ; – type (optional): ; 0 = dots are rectangles (default)
10 of 24 13/06/2016 18:24 LibreLogo Toolbar - LibreOffice Help https://help.libreoffice.org/index.php?title=Writer/LibreL...
; 2 = dots are squares (lengths and distances are relative to the pensize)
PENSTYLE [3, 1mm, 2, 4mm, 2mm, 2] ; ...––...––...––
Fill settings
FILLCOLOR/FILLCOLOUR (fc)
FILLCOLOR “blue” ; fill with blue color, see also PENCOLOR FILLCOLOR “invisible” CIRCLE 10 ; unfilled circle FILLCOLOR [“blue”, “red”] ; gradient between red and blue FILLCOLOR [[255, 255, 255], [255, 128, 0]] ; between white and orange FILLCOLOR [“blue”, “red”, 1, 0, 0] ; set axial gradient (with the required rotation and border settings), possible values: 0-5 = linear, axial, radial, elliptical, square and rectangle gradients FILLCOLOR [“red”, “blue”, 0, 90, 20] ; linear with 20% border, rotated with 90 degrees from the actual heading of the turtle FILLCOLOR [“red”, “blue”, 0, 90, 20, 0, 0, 200, 50] ; from 200% to 50% intensity FILLCOLOR [ANY, ANY, 2, 0, 0, 50, 50] ; radial gradient with random colors and 50-50% horizontal and vertical positions of the center
FILLTRANSPARENCY
FILLTRANSPARENCY 80 ; set the transparency of the actual fill color to 80% FILLTRANSPARENCY [80] ; set linear transparency gradient from 80% to 0% FILLTRANSPARENCY [80, 20] ; set linear transparency gradient from 80% to 20% FILLTRANSPARENCY [80, 20, 1, 90] ; set axial transparency gradient rotated with 90 degrees from the actual heading of the turtle FILLTRANSPARENCY [80, 20, 2, 0, 20, 50, 50] ; set radial transparency gradient from outer 80% to inner 20% transparency with 20% border and with 50-50% horizontal and vertical positions of the center
FILLSTYLE
FILLSTYLE 0 ; fill without hatches (default) FILLSTYLE 1 ; black single hatches (horizontal) FILLSTYLE 2 ; black single hatches (45 degrees) FILLSTYLE 3 ; black single hatches (-45 degrees) FILLSTYLE 4 ; black single hatches (vertical) FILLSTYLE 5 ; red crossed hatches (45 degrees) FILLSTYLE 6 ; red crossed hatches (0 degrees)
11 of 24 13/06/2016 18:24 LibreLogo Toolbar - LibreOffice Help https://help.libreoffice.org/index.php?title=Writer/LibreL...
FILLSTYLE 7 ; blue crossed hatches (45 degrees) FILLSTYLE 8 ; blue crossed hatches (0 degrees) FILLSTYLE 9 ; blue triple crossed FILLSTYLE 10 ; black wide single hatches (45 degrees)
; custom hatches specified by a list with the following arguments: ; – style (1 = single, 2 = double, 3 = triple hatching) ; – color ; – distance ; – degree
FILLSTYLE [2, “green”, 3pt, 15°] ; green crossed hatches (15 degrees)
Drawing objects
CIRCLE
CIRCLE 100 ; draw a circle shape (diameter = 100pt)
ELLIPSE
ELLIPSE [50, 100] ; draw an ellipse with 50 and 100 diameters ELLIPSE [50, 100, 2h, 12h] ; draw an elliptical sector (from 2h clock position to 12h) ELLIPSE [50, 100, 2h, 12h, 2] ; draw an elliptical segment ELLIPSE [50, 100, 2h, 12h, 3] ; draw an elliptical arc
SQUARE
SQUARE 100 ; draw a square shape (size = 100pt)
RECTANGLE
RECTANGLE [50, 100] ; draw a rectangle shape (50×100pt) RECTANGLE [50, 100, 10] ; draw a rectangle with rounded corners
POINT
POINT ; draw a point with size and color of the pen
CLOSE can join the last points, FILL can fill the shape defined by points. For example, it’s easy to draw a “flat” star starting from its center:
12 of 24 13/06/2016 18:24 LibreLogo Toolbar - LibreOffice Help https://help.libreoffice.org/index.php?title=Writer/LibreL...
PENUP REPEAT 5 [ FORWARD 80 POINT BACK 80 RIGHT 36 FORWARD 50 POINT BACK 50 RIGHT 120 ] FILL
LABEL
LABEL “text” ; print text in the turtle position LABEL 'text' ; see above LABEL "text ; see above (only for single words)
TEXT
CIRCLE 10 TEXT “text” ; set text of the actual drawing object
Font settings
FONTCOLOR/FONTCOLOUR
FONTCOLOR “green” ; set font color
FONTFAMILY
FONTFAMILY “Linux Libertine G” ; set font (family) FONTFAMILY “Linux Libertine G:smcp=1” ; set also font feature (small caps) FONTFAMILY “Linux Libertine G:smcp=1&onum=1” ; small caps + old figures
FONTSIZE
FONTSIZE 12 ; set 12pt
FONTWEIGHT
FONTWEIGHT “bold” ; set bold font FONTWEIGHT “normal” ; set normal weight
13 of 24 13/06/2016 18:24 LibreLogo Toolbar - LibreOffice Help https://help.libreoffice.org/index.php?title=Writer/LibreL...
FONTSTYLE
FONTSTYLE “italic” ; set italic variant FONTSTYLE “normal” ; set normal variant
PICTURE (pic)
PICTURE is for
shape grouping; starting new line shapes; saving SVG images and SVG/SMIL animations; keeping the consistency of positions and line shapes at the left border.
Shape grouping
; PICTURE [ LibreLogo_commands ] PICTURE [ FORWARD 100 CIRCLE 100 ] ; tree-like grouped shape
See also “Group” in LibreOffice Writer Help.
TO tree location PENUP POSITION location HEADING 0 PENDOWN PICTURE [ FORWARD 100 CIRCLE 100 ] ; tree-like grouped shape END
PICTURE [ tree [30, 50] tree [100, 50] ] ; grouped shapes in a grouped shape
Starting new line shapes
PICTURE ; start a new line shape FORWARD 10 PICTURE FORWARD 10 ; two line shapes
Saving SVG images
PICTURE “example.svg” [ CIRCLE 5 ] ; save the picture as an SVG image file in the user folder PICTURE “Desktop/example.svg” [ FORWARD 100 CIRCLE 5 ] ; as above, with a relative path PICTURE “/home/user/example.svg” [ CIRCLE 5 ] ; absolute path for Unix/Linux PICTURE “C:\example.svg” [ CIRCLE 5 ] ; absolute path for Windows
Saving SVG/SMIL animations (drawings with SLEEP commands)
14 of 24 13/06/2016 18:24 LibreLogo Toolbar - LibreOffice Help https://help.libreoffice.org/index.php?title=Writer/LibreL...
PICTURE “animation.svg” [ CIRCLE 5 SLEEP 1000 CIRCLE 99 ] ; save as an SVG/SMIL animation (see also SLEEP) PICTURE “animation2.svg” [ CIRCLE 5 SLEEP 1000 CIRCLE 99 SLEEP 2000 ] ; as above, but using SLEEP after the last object will result looping: after 2 seconds the SVG animation restarts in SMIL-conformant browsers
Consistency at the left border
Use picture to keep the consistency of positions and line shapes at the left border of Writer:
PICTURE [ CIRCLE 20 POSITION [-100, 100] CIRCLE 20 ]
Loops
REPEAT
; REPEAT number [ commands ]
REPEAT 10 [ FORWARD 10 LEFT 45 CIRCLE 10 ] ; repeat 10 times
; number is optional
REPEAT [ POSITION ANY ] ; endless loop
REPCOUNT
Loop variable (also in the FOR and WHILE loops).
REPEAT 100 [ FORWARD REPCOUNT LEFT 90 ]
FOR IN
Loop for the list elements:
FOR i IN [1, 5, 7, 9, 11] [ FORWARD i LEFT 90 ]
Loop for the characters of a character sequence:
FOR i IN “text” [
15 of 24 13/06/2016 18:24 LibreLogo Toolbar - LibreOffice Help https://help.libreoffice.org/index.php?title=Writer/LibreL...
LABEL i FORWARD 10 ]
WHILE
WHILE TRUE [ POSITION ANY ] ; endless loop WHILE REPCOUNT <= 10 [ FORWARD 50 LEFT 36 ] ; as REPEAT 10 [ ... ]
BREAK
Stop the loop.
REPEAT [ ; endless loop POSITION ANY IF REPCOUNT = 100 [ BREAK ] ; equivalent of the REPEAT 100 [ ... ] ]
CONTINUE
Jump into the next iteration of the loop.
REPEAT 100 [ POSITION ANY IF REPCOUNT % 2 = 0 [ CONTINUE ] CIRCLE 10 ; draw circles on every 2nd positions ]
Conditions
IF
; IF condition [ true block ] ; IF condition [ true block ] [ false block ]
IF a < 10 [ PRINT “Small” ] IF a < 10 [ PRINT “Small” ] [ PRINT “Big” ]
AND, OR, NOT
Logical operators.
IF a < 10 AND NOT a = 5 [ PRINT “0, 1, 2, 3, 4, 6, 7, 8 or 9” ]
16 of 24 13/06/2016 18:24 LibreLogo Toolbar - LibreOffice Help https://help.libreoffice.org/index.php?title=Writer/LibreL...
IF a < 10 AND a != 5 [ PRINT “0, 1, 2, 3, 4, 6, 7, 8 or 9” ] ; as above
Subroutines
TO, END
New word (or procedure).
TO triangle REPEAT [ FORWARD 100 RIGHT 120 ] FILL END
REPEAT 10 [ triangle PENUP POSITION ANY PENDOWN ]
OUTPUT
Return value of the function.
TO randomletter OUTPUT RANDOM “qwertzuiopasdfghjklyxcvbnm” END
PRINT randomletter + randomletter + randomletter ; print 3-letter random character sequence
STOP
Return from the procedure.
TO example number IF number < 0 [ STOP ] PRINT SQRT number ; print square root ]
example 100 example -1 ; without output and error example 25
Default variables
ANY
Default random value of colors, etc.
17 of 24 13/06/2016 18:24 LibreLogo Toolbar - LibreOffice Help https://help.libreoffice.org/index.php?title=Writer/LibreL...
PENCOLOR ANY ; random pen color
TRUE
Logical value.
WHILE TRUE [ POSITION ANY ] ; endless loop PRINT TRUE ; print true
FALSE
Logical value.
WHILE NOT FALSE [ POSITION ANY ] ; endless loop PRINT FALSE ; print false
PAGESIZE
PRINT PAGESIZE ; print list of the page sizes in points, eg. [595.30, 841.89]
PI/π
PRINT PI ; print 3.14159265359
Input/Output
PRINT “text” ; print “text” in a dialog box PRINT 5 + 10 ; print 15
INPUT
PRINT INPUT “Input value?” ; ask and print a string by a query dialog box PRINT FLOAT (INPUT “First number?”) + FLOAT (INPUT “Second number?”) ; simple calculator
SLEEP
SLEEP 1000 ; wait for 1000 ms (1 sec)
GLOBAL
18 of 24 13/06/2016 18:24 LibreLogo Toolbar - LibreOffice Help https://help.libreoffice.org/index.php?title=Writer/LibreL...
Set global variables used in procedures.
GLOBAL about about = “LibreLogo”
TO example PRINT about GLOBAL about ; when we want to add a new value about = “new value for the global variable” END
example PRINT about
Functions
RANDOM
PRINT RANDOM 100 ; random float number (0 <= x < 100) PRINT RANDOM “text” ; random letter of the “text” PRINT RANDOM [1, 2] ; random list element (1 or 2)
INT
PRINT INT 3.8 ; print 3 (integer part of 3.8) PRINT INT RANDOM 100 ; random integer number (0 <= x < 100) PRINT INT “7” ; convert the string parameter to integer
FLOAT
; convert the string parameter to float number PRINT 2 * FLOAT “5.5” ; print 11.0
STR
; convert the number parameter to string PRINT “Result: ” + STR 5 ; print “Result: 5” PRINT 10 * STR 5 ; print 5555555555
SQRT
PRINT SQRT 100 ; print 10, square root of 100
19 of 24 13/06/2016 18:24 LibreLogo Toolbar - LibreOffice Help https://help.libreoffice.org/index.php?title=Writer/LibreL...
SIN
PRINT SIN 90 * PI/180 ; print 1.0 (sinus of 90° in radians)
COS
PRINT COS 0 * PI/180 ; print 1.0 (cosinus of 0° in radians)
LOG10
PRINT LOG10 100 ; print 2.0 (common logarithm of 100)
ROUND
PRINT ROUND 3.8 ; print 4 (rounding 3.8) PRINT ROUND RANDOM 100 ; random integer number (0 <= x <= 100)
ABS
PRINT ABS -10 ; print 10, absolute value of -10
COUNT
PRINT COUNT “text” ; print 4, character count of “text” PRINT COUNT [1, 2, 3] ; print 3, size of the list
SET
; Convert list to Python set PRINT SET [4, 5, 6, 6] ; print {4, 5, 6} PRINT SET [4, 5, 6, 6] | SET [4, 1, 9] ; print {1, 4, 5, 6, 9}, union PRINT SET [4, 5, 6, 6] & SET [4, 1, 9] ; print {4}, intersection PRINT SET ([4, 5, 6, 6]) - SET [4, 1, 9] ; print {5, 6}, difference PRINT SET [4, 5, 6, 6] ^ SET [4, 1, 9] ; print {1, 5, 6, 9}, symmetric difference
RANGE
; Python-like list generation PRINT RANGE 10 ; print [0, 1, 2, 3, 4, 5, 6, 7, 8, 9] PRINT RANGE 3 10 ; print [3, 4, 5, 6, 7, 8, 9] PRINT RANGE 3 10 3 ; print [3, 6, 9]
20 of 24 13/06/2016 18:24 LibreLogo Toolbar - LibreOffice Help https://help.libreoffice.org/index.php?title=Writer/LibreL...
FOR i IN RANGE 10 50 10 [ ; loop for [10, 20, 30, 40] FORWARD i LEFT 90 ]
LIST
; remove the repeating elements of a list using set and list conversion PRINT LIST (SET [1, 3, 5, 5, 2, 1]) ; print [1, 3, 5, 2]
TUPLE
Conversion to Python tuple (non-modifiable list)
PRINT TUPLE [4, 5]
SORTED
It returns with a sorted list.
PRINT SORTED [5, 1, 3, 4] ; print [1, 3, 4, 5]
SUB
Substitute character sequences using regex (regular expression) patterns.
PRINT SUB (“t”, “T”, “text”) ; print “Text”, replacing “t” with “T” PRINT SUB (“(.)”, “\\1\\1”, “text”) ; print “tteexxtt”, doubling every characters
SEARCH
Search character sequences patterns using regex patterns.
IF SEARCH (“\w”, word) [ PRINT “Letter in the word.” ]
FINDALL
Find all character sequences in the input string matching the given regex pattern.
PRINT FINDALL(“\w+”, “Dogs, cats.”) ; print [“Dogs”, “cats”], the list of the words.
MIN
PRINT MIN [1, 2, 3] ; print 1, the lowest element of the list
21 of 24 13/06/2016 18:24 LibreLogo Toolbar - LibreOffice Help https://help.libreoffice.org/index.php?title=Writer/LibreL...
MAX
PRINT MAX [1, 2, 3] ; print 3, the greatest element of the list
Color constants
PENCOLOR “SILVER” ; set by name PENCOLOR [1] ; set by identifiers PENCOLOR “~SILVER” ; random silver color
22 of 24 13/06/2016 18:24 LibreLogo Toolbar - LibreOffice Help https://help.libreoffice.org/index.php?title=Writer/LibreL...
Identifier Name 0 BLACK 1 SILVER 2 GRAY/GREY 3 WHITE 4 MAROON 5 RED 6 PURPLE 7 FUCHSIA/MAGENTA 8 GREEN 9 LIME 10 OLIVE 11 YELLOW 12 NAVY 13 BLUE 14 TEAL 15 AQUA 16 PINK 17 TOMATO 18 ORANGE 19 GOLD 20 VIOLET 21 SKYBLUE 22 CHOCOLATE 23 BROWN 24 INVISIBLE
Retrieved from "http://help.libreoffice.org/index.php?title=Writer /LibreLogo_Toolbar&oldid=130e7 "
Category: EN
23 of 24 13/06/2016 18:24 LibreLogo Toolbar - LibreOffice Help https://help.libreoffice.org/index.php?title=Writer/LibreL...
EN
This page was last modified 06:47:24, 2015-09-28 by LibreOffice Help user WikiSysop. Content is available under the GNU Lesser General Public License (LGPLv3), unless otherwise specified, originally based on OpenOffice.org help. "LibreOffice" and "The Document Foundation" are registered trademarks of their corresponding registered owners or are in actual use as trademarks in one or more countries. Their respective logos and icons are also subject to international copyright laws. Use thereof is explained in our trademark policy unless otherwise noted.
24 of 24 13/06/2016 18:24