JuniorTheoryCommon

What does the program print (lines separated by spaces)?

JavaScript

let x = 1;

{
    let x = 2;
    console.log(x);
}

console.log(x);

2 1

Expecting 2 2, as if the inner line changed the outer x: let x = 2 declares a new variable that lives only inside the {} and hides the outer one there.
Expecting SyntaxError for declaring x twice: that happens only within the same block; a let in an inner block is a separate variable.

JuniorTheoryCommon

JavaScript

let x = 1;

{
    let x = 2;
    console.log(x);
}

console.log(x);

2 1

Expecting 2 2, as if the inner line changed the outer x: let x = 2 declares a new variable that lives only inside the {} and hides the outer one there.
Expecting SyntaxError for declaring x twice: that happens only within the same block; a let in an inner block is a separate variable.