What is for loop statement in JavaScript?

The 'for' loop is the most compact form of looping. It includes the following three important parts −

  • The loop initialization where we initialize our counter to a starting value. The initialization statement is executed before the loop begins.

  • The test statement which will test if a given condition is true or not. If the condition is true, then the code given inside the loop will be executed, otherwise the control will come out of the loop.

  • The iteration statement where you can increase or decrease your counter.

You can put all the three parts in a single line separated by semicolons.


The syntax of for loop is JavaScript is as follows,

for(initialization;test condition;iteration statement){
   Statement(s)to be executed if test condition is true


You can try to run the following example to learn how a for loop works in JavaScript −

Live Demo

         var count;
         document.write("Starting Loop" + "<br />");
         for(count = 0; count < 10; count++){
            document.write("Current Count : " + count );
         document.write("Loop stopped!");