Is it necessary to write else part in every if condition?

Question

The question I asked might be closed, But i just want to know that is it necessary to write else part of every if condition. One of my senior programmer said me that \"you shoul

Answer 1

No, It's not required to write the else part for the if statement.

In fact most of the developers prefer and recommend to avoid the else block.

that is

Instead of writing

if (number >= 18) {
    let allow_user = true;
} else {
    let allow_user = false;
}

Most of the developers prefer:

let allow_user = false;
if (number >= 18) {
    let allow_user = true;
}