Do you know what will be the output of this code? for (let i = 0; i console.log(i)); }

Why does let in a for loop fix the setTimeout closure problem?

Do you know what will be the output of this code?

JavaScript

for (let i = 0; i < 3; i++) {
  setTimeout(() => console.log(i));
}

Show answer and explanation

The answer is 0 1 2.

With let, each iteration gets a fresh copy of i. Every callback closes over its own binding, so they print the values from their own iteration.