Javascript - Statement while Statement

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Introduction

The while statement is a pretest loop.

The loop condition is evaluated before the loop body has been executed.

Tt is possible that the body of the loop is never executed. Here's the syntax: 

while(expression)
   statement

And here's an example: 

var i = 0;
while (i < 10) {
   i += 2;
}

In this example, the variable i starts out equal to 0 and is incremented by two each time through the loop.

As long as the variable is less than 10, the loop will continue.