Iteration

Basically makes code a lot shorter
You need an operator
++ or --
Postfix or prefix mode
Examples
- WHile loop
- for loop
- recursion loop
- nested iteration

While loop

Keeps running while something is true
Until the condition is false it'll stop

For loop

For as long as a condition is met, something will keep occuring
For each part of the loop

Recursion Loop

You have a function and in that function you put that function itself inside
Function calls itself to repeat (recurses)

Nested iteration

Not a method but rather a technique
Putting a loop inside of a loop

import java.util.Scanner;

public class Checker 
{
    public static void main(String[] args) 
    {
        int number;  
	
        // Create a Scanner object for keyboard input.  
        Scanner keyboard = new Scanner(System.in);  
             
        // Get a number from the user.  
        System.out.print("Enter a number in the range of 1 through 100: ");  
        number = keyboard.nextInt();  

        while ()
        {  
           System.out.print("Invalid input. Enter a number in the range " +  
                            "of 1 through 100: ");  
           number = keyboard.nextInt();  
        } 
    }
}

Checker.main(null);

|           while ()
illegal start of expression

public class LoopConversion 
{
    public static void main(String[] args) 
    {
        //convert to for loop
        for (int count = 1; count < 5;count++)
        {
            System.out.println("count is " + count);
        }
    }
}