The for and for-in loops
In this lesson, you will have an overview of all flow-control statements provided by the JavaScript language.
We'll cover the following...
The for Loop
Just as in many programming languages, the for loop provides a pretest with optional variable initialization and optional post-loop code to be executed:
Illustration
Here is an illustration to explain the above concept
Syntax
The syntax of the for loop in JavaScript is as follows:
for (initialization ; condition ; post_loop_expression) statement
Example
This example shows the usage of a for loop:
Node.js
for (var i = 0; i < 10; i++) {console.log(i);}
The initialization, condition, and post_loop_expression are all optional, so you can create an infinite loop by omitting all of them:
for (;;;) {console.log("Nothing gonna stop me");}
The for-in loop
There is another for loop in JavaScript that can be used only to enumerate the properties of an object, the for-in ...