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// return for values if not define use values

// will undefined

function sum(num1, num2) {

let calculate = num1 * num2;

return 'the values num1 and num2 is ' + calculate;

}

const number1 = sum(100, 200);

const number2 = sum(100, 50);

const calculate = [number1, number2];

console.log(calculate);

//if without return will undefined so use return

function calculate(values) {

console.log('values number is ' + values);

}

const width = calculate(100);

const height = calculate(100);

// here for add to array

const dimensions = [width, height];

console.log(dimensions);

output

values number is 100

[ undefined, undefined ]