It's important for a program to be able to do things repeatedly; for example, a robot must read its sensors repeatedly and react only when certain conditions are met.  

1. Create a new project folder named !LoopExample
1. Open the !LoopExample folder
1. Create a new file (File->New File)
1. Cut and paste the following program into the editor:
{{{
public class LoopExample {
    public static void main(String args[]) {
        int counter;  

        counter = 1;
        while (counter <= 10) {
            System.out.println(counter);
            counter = counter + 1;
        }
    }
}
}}}
1. Save the program as !LoopExample.java
1. Run the program in the debugger with a breakpoint set at the line while (counter <= 10)
1. Step through the program a line at a time, observing the program output, variables, and flow of execution

=== Understanding the program
Our program:
1. Creates a loop counter variable
1. Initializes the loop counter to 1
1. Repeatedly evaluates the expression (counter <= 10) and while the expression evaluates as true
   1. prints the counter value
   1. increments the counter value by 1

The result of running the program is that the numbers 1 through 10 are printed.
With only 10 iterations of the loop, you might ask whether it might be easier to just print each number manually,
but consider a loop that might require thousands of iterations or that might run indefinitely until something happened:
{{{
    while (distanceToTarget > 0) {
       driveForward(0.50);
       distanceToTarget = checkDistance();
    }
}}}

Java includes three types of loop statements: 
   * while
   * for
   * do

=== Extra credit
* Read more about [https://www.geeksforgeeks.org/loops-in-java/ Java loops] 
* Re-write the sample program using a '''do''' loop
* Re-write the sample program using a '''for''' loop