JavaScript in 30 words
Browse all 40 concepts

JavaScript Functions Explained Simply

Functions in JavaScript consist of the function keyword followed by the name of the function, a list of parameters and statements that define the function.

function calculateTotal(price, quantity) {
  return price * quantity;
}

const total = calculateTotal(8, 3);
console.log(total);
console.log(calculateTotal(5, 2));

Read more about Functions on MDN

AI panel

Ask AI to clarify the parts you don’t fully understand.

Connect your API key

Use your own API key for explanations and follow-up questions.

Get an API key ↗

Enter your API key and load your account’s models, or choose “Other model…” to enter a text model ID. You can change it later in Connection settings.

API usage is billed by your provider, separately from ChatGPT or Claude subscriptions. Loading models and connecting do not generate a paid answer.