Функция стрелки JavaScript Правила
const add3 = (num1, num2, num3) => return num1 + num2 + num3;
Fantastic Falcon
const add3 = (num1, num2, num3) => return num1 + num2 + num3;
const sayHi = ()=>console.log('Hi');
const square = num => num ** 2;