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// function expressions use variable for declare

// and without name after write function or called

// anonymous function

// example here function basics

function add(num1, num2) {

return num1 * num2;

}

// function expression

// remember name add already exist please dont same

const addExpressions = function (num1, num2) {

return num1 * num2;

};

// function ES6

const addES6 = (num1, num2) => num1 * num2;

// print them

const num1 = add(10, 10);

const num2 = add(20, 10);

// access use array

const sum = [num1, num2, addExpressions(10, 30), addES6(20, 20)];

console.log(sum);