why javasript cant find the variable?

Question

const birthYear = 2002;
let century;
if (birthYear <= 2000) 
    let century = 20;
} else {
    let century = 21;
}
console.log(century);

So the problem is when i run the code console says "undefined". I wanna know what is the problem. (I'm new at coding and all this stuff, so, please help. Thanks in advance)

Each one of those variables is a different block scoped variabled. That's how `let` works — Liam, Aug 19 '21 at 09:04
Also see [What's the difference between using “let” and “var”?](https://stackoverflow.com/questions/762011/whats-the-difference-between-using-let-and-var) — Liam, Aug 19 '21 at 09:05

score -2 · Accepted Answer · answered Aug 19 '21 at 09:06

-2

here answer

const birthYear = 2002;
let century;
if (birthYear <= 2000) {

   century = 20
} else {
    century = 21
}
console.log(century)

answered Aug 19 '21 at 09:06

Tushar

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why javasript cant find the variable?

1 Answers1