Semicolon for declaring functions in JavaScript

When declaring a function as a Function Declaration, there is no semicolon after the curly brace }:

javascriptfunction func() {
  console.log('!');
}

But if the function is declared as a Function Expression, then after } a semicolon is placed:

javascriptlet func = function() {
  console.log('!');
};

Why: because in JavaScript any expression must end with a semicolon, and in this case we just have an expression. This semicolon is optional, since JavaScript generally allows them to be omitted, but it is desirable. Always put :)

javascriptlet func1 = function() {console.log('!')}
let func2 = function() {
  console.log('!')
}
function func3() {
  console.log('!')
}