JavaScript For..In Loop - Java Script

What is JavaScript For..in Loop?

The for...in loop in JavaScript is mainly used to loop through properties of a JavaScript object. So far we haven’t dealt with Objects, so you may not feel convenient with this loop.Once you understand the behavior of objects in JavaScript you will come to know the usefulness of for-in loop.

Syntax:
for(variablenameinobject){
statementor block to execute
}

A For-in loop performs iterations on the properties of an object in a random order. Inevery iteration, one property from object is assigned to variablename and this loop persistsuntil all the object properties are worn out.

Example:

Try the below example to understand the implementation of ‘for-in’ loop. It prints the web browser Navigator object properties.

This will produce the following output:

JavaScript For..in Loop

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