let vs var using setTimeout in javascript

let vs var using setTimeout in javascript

Hello viewers, whats up!! Here i am back again with the new post of let vs var using setTimeout in javascript. Javascript is a high level programming language used for known as web development. With this you can create dynamic and interactive content on websites.

Syntax is similar to that of other programming languages like java and C. It is client side scripting language and when we talk about its Data types , it is support various data types, including numbers, strings booleans objects, arrays and functions.

Here we have a problem about setTimeout in javascript. Question is that there are two types of using var and let in setTimeout,  So, in javascript might be same but little bit difference because of if we use var with setTimeout and forloop then same number print many times (We will give you as many numbers as you want in the loop).

 when we use let in setTimeout and forloop then output is simple looping number printed.

Let's Code

for (var i=0; i<3; i++)
{
    setTimeout(() => {
        console.log("When we use of var with setTimeout", i);  
    })
}

//www.kumaratuljaiswal.in

for (let i=0; i<3; i++)
{
    setTimeout(() => {
        console.log("when we use of let with setTimeout", i);
    })
}

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