Count the number of elements in an array javascript Code Answer

The JavaScript array object has a length property that returns the number of elements in the array. The length property is read-only, so you can't change it.count elements is a function that returns the number of elements in an array. It accepts an array as a parameter and returns the count of elements in it.

count the number of elements in an array javascript

on Jan 01, 1970

var arr = [10,20,30,40,50]; //An Array is defined with 5 instances

var len= arr.length;  //Now arr.length returns 5.Basically, len=5.
console.log(len); //gives 5
console.log(arr.length); //also gives 5

1

When working with arrays, you may need to know how many elements are in the array before you can do anything else. You could count them yourself by looping through all of them and counting them up, but there's a better way!

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