scope closure

scopeclosure.js

a = ['a','b', 'c']
for (let i = 0; i < 3; i++) {
    var c = a[i];
    setTimeout(()=> console.log(c)); // c c c
}

//is same as, var is function scoped
var c;
a = ['a','b', 'c']
for (let i = 0; i < 3; i++) {
    c = a[i];
    setTimeout(()=> console.log(c)); // c c c
}

//let is block scoped
a = ['a','b', 'c']
for (let i = 0; i < 3; i++) {
    let c = a[i];
    setTimeout(()=> console.log(c)); // a b c
}