Why this code dont print i and j variables?
(function f() {
let i = 1;
let j = 2;
return () => {
console.log(i);
console.log(j);
}
})()
I know, i know... this code yes, works:
let f = () => {
let i = 1;
let j = 2;
return () => {
console.log(i);
console.log(j);
}
}
f()();
Yes, the last code works, but I what to know why the first code doesn't works
Thanks a lot
You are returning a function (return () => {}) from the function but not calling it. You could simply just log the values in the function without returning a new function.
(function f() {
let i = 1;
let j = 2;
console.log(i);
console.log(j);
})();Or call it like this.
(function f() {
let i = 1;
let j = 2;
return () => {
console.log(i);
console.log(j);
}
})()();