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Rest Parameters In Javascript

In this article, we will discuss rest parameters in JavaScript.

Purpose

Consider a scenario where the number of input parameters are not known in advance. In this scenario, the rest parameters are the most fitting solution.

In rest parameters, input parameters are passed as an object.

Example

Consider the following code

<script>
   function sum(...args) {
       document.write("Calling sum function with " + args.length + " parameters");
       document.write("<br/>");
   }

   sum(1, 2);
   sum(1, 2, 3);
   sum(1, 2, 3, 4);
</script>

Try It

In the above code, we are calling the sum function 3 times with different numbers of parameters.

Output

Posted By -	Karan Gupta

Posted On -	Tuesday, August 24, 2021

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