var let
var x = 1;
console.log(x); // 1
if (true) {
// console.log(x); // ReferenceError: x is not defined
let x = 2;
console.log(x); // 2
}
console.log(x); // 1
Press ← or → to navigate between chapters
Press S or / to search in the book
Press ? to show this help
Press Esc to hide this help
var x = 1;
console.log(x); // 1
if (true) {
// console.log(x); // ReferenceError: x is not defined
let x = 2;
console.log(x); // 2
}
console.log(x); // 1