Functions — Reusable Steps

Package Ada's calculation inside a function wey she fit call anytime.

What you'll learn

Create a function
Use parameters and return
Call a function

Before you start

making-decisions

Ada dey add prices many times every day. Instead of writing di same thing again and again, she fit package am inside a function — one reusable box of steps.

Create a function

function addPrices(priceA, priceB) {
  let total = priceA + priceB;
  return total;
}

priceA and priceB na parameters — di inputs.
return dey send di result back to whoever call am.

Call di function

let todayTotal = addPrices(850, 450);
console.log(todayTotal);

Now, anytime Ada get new prices, she just call addPrices again. One small step wey you fit use many times — na so code stay clean and no dey repeat.

Try it yourself

Reusable addition

Open in playground →

javascript

function addPrices(priceA, priceB) {
  return priceA + priceB;
}
let todayTotal = addPrices(850, 450);
console.log(todayTotal);

Output:

Practice exercises

Exercise 1: Your own function

Create a function 'addPrices' wey dey add two numbers and return di result. Call am with 5 and 3, then print di result.

Preview

Console

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