Dealing with duplicate declaration warning for loop variables

Question

Consider the following code:

for (var i=0; i<100; i++) {
    // your code here
}
// some other code here
for (var i=0; i<500; i++) {
    // custom code her         


        

Answer 1

let keyword is introduced in javascript 1.7. Please find MDN documentation here

Replacing var to let inside for loop solves the problem and now one can declare local variable inside the scope of a loop. Check out stackoverlow community explanation here: What's the difference between using "let" and "var" to declare a variable?

Code from future:

for (let i = 0; i < someVar.length; i++) {
    // do your thing here
}