loops and closures javascript code example

Example 1: javascript closure inside loop

var funcs = [];

function createfunc(i) {
  return function() {
    console.log("My value: " + i);
  };
}

for (var i = 0; i < 3; i++) {
  funcs[i] = createfunc(i);
}

for (var j = 0; j < 3; j++) {
  // and now let's run each one to see
  funcs[j]();
}

Example 2: How Closure works totally different in Loop!!!!

Explanation From Medium: 

//https://medium.com/brandsoft/variable-scope-and-iifes-in-javascript-3cf85f79597e#:~:text=By%20using%20an%20IIFE%2C%20we,when%20the%20IIFE%20is%20executed.

Code:

// for (var i = 0; i<=5; i++){  // this type of problem created
//     setTimeout(function (){
//         console.log('Current Value is ' + i); 
//     }, 1000 * i)
// }

// for (var i = 0; i <= 5; i++) {
//     (function (n) { // to avoid previous example's fault
//         setTimeout(function () {
//             console.log('Current Value is ' + n);
//         }, 1000 * n)
//     })(i);
// }

// for (let i = 0; i<=5; i++){ // in this case (let) behaves different from var
//     setTimeout(function (){
//         console.log(i);
//     }, 1000 * i)
// }