While Loops

Runs while the conditions following “while” are true - possibly forever!

To “break” out of the loop, update a “control variable” in the loop so eventually the conditions will be false

While loop example

Processing, Java, C#:

int count = 0;

while (count < 5) {
    println(count);
    count++;
}

JavaScript and JS libraries:

var count = 0;

while (count < 5) {
    println(count);
    count++;
}

Both will print:

0 1 2 3 4

Here:

1. Type: while (line 3)

2. Initialization: int count = 0; and var count = 0; (line 1)

3. Conditions: (count < 5) (line 3) (only runs the loop code when the count is 0-4)

4. Update: count++; (line 5)

5. Action: println(count); (line 4) (prints the current value of count)