While

While Loops

Eval First While Loop

The condition is evaluated first before running any body code of the loop.

while (expression) { // <-- Loop expression

    // Loop body: Sub-statements that execute if the 
    // expression evaluats to true 
}

// Statements that execute after the expression evaluates to false
// Or loop concludes

Execute Then Eval Do-While Loop

This condition will always execute the body code once before testing the expression for true. You can use this if you want the code executed at least once before the loop has a chance to break itself on its tested condition.

do {
   // Loop body
} while (loopExpression);

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