freeCodeCamp/guide/english/javascript/loops/while-loop/index.md

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2018-10-12 19:37:13 +00:00
---
title: While Loop
---
The while loop starts by evaluating the condition. If the condition is true, the statement(s) is/are executed. If the condition is false, the statement(s) is/are not executed. After that, while loop ends.
Here is the **syntax** for while loop:
## Syntax:
while (condition)
{
statement(s);
}
_statement(s):_ A statement that is executed as long as the condition evaluates to true.
_condition:_ Here, condition is a Boolean expression which is evaluated before each pass through the loop. If this condition evaluates to true, statement(s) is/are executed. When condition evaluates to false, execution continues with the statement after the while loop.
## Example:
var i = 1;
while (i < 10)
{
console.log(i);
i++; // i=i+1 same thing
}
Output:
1
2
3
4
5
6
7
8
9
*Source: [While Loop - MDN](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/while)*