If All the Code Snippets Below Assume Properly That an Array, Myarray, Has Been Properly

Name______APCS A (Java Concepts Worksheet)

Beneath each header below, type or write a brief code snippet. Be sure to properly declare && || initialize appropriate local variables. For example; int x, y, temp, sum; double average; boolean isEven = false;

If the problem calls for an array, assume the following array instantiation; int[] myArray = new int[10]; …

How to average correctly – the simple version! Type code here.

// the key here is to cast the sum to a double.

How to average correctly in an array Type code here. Don’t forget your “for” loop!

// the key here is to cast the sum to a double to not lose decimal data

How to find max/min in an array Type code here. Don’t forget your “for” loop!

// the key here is to properly initialize max and min before entering the for loop

How to swap elements – the simple version! Begin code here.

// the key here is to perform the swap in the correct order

How to swap elements in an array – the simple version! Type code here. No loop this time – just a simple swap.

// the key here is to perform the swap in the correct order

How to reverse an array Begin code here. Remember you’re only looping through half of the array!

// the key here is to perform the swap in the correct order through just half of the array How to increase the size of an array Begin code here.

Explain the differences between selection sort and insertion sort algorithms. When would you use one over the other? Type answer here.

How to turn a number into a String int x; String y;

Type answer here…

How to prompt users for input. What lines are necessary to “scan” for input?

Type answer here…

How to compute/generate a random number.

// HINT: you will need to use the math class to do this. int num1; double num2;

// First, generate random integer from 0 to 9 Type answer here…

// Second, generate random integer from 1 to 10 Type answer here…

// Third, generate random integer from 20 to 34 Type answer here…

// Fourth, generate random decimal from 0 to 0.99 Type answer here…

// Fifth, generate random decimal from 0 to 5.99 Type answer here…

How to extract individual digits from an integer.

// HINT: the concept is called modulus and you will need to use % operator(remainder) int num = 12345; int digitNum; // will be the extracted number

// get the ones digit Type answer here…

// get the tens digit Type answer here… // get the hundreds digit Type answer here…