Functions · Lesson 14 of 45

Functions

Write code once, use it many times.

9 minutes3 games

A function is named code that takes inputs (parameters) and can give back a result with return. The values you pass when calling it are arguments. A function exits as soon as it reaches return.

Step by step1 / 5

▶function area(width, height) {
2 return width * height
3}
4const a = area(4, 5)
5console.log(a)

Variables

—

Output

…

This only defines the function; nothing runs yet.

What's the output?

function double(n) {
  return n * 2
  console.log("done")
}
console.log(double(4))

What will this code print?

Complete the code

Complete the function that returns the bigger of two numbers.

function max(a, b) {
  if (a > b) {
     a
  }
  return 
}

Exercise

Write greet(name) that returns Welcome, <name>!, then print greet("Ali").

Expected output: Welcome, Ali!

JavaScript

function greet(name) {
  
}

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JavaScript

Functions · Lesson 14 of 45

Functions

Write code once, use it many times.

9 minutes3 games

Step by step1 / 5

▶function area(width, height) {
2 return width * height
3}
4const a = area(4, 5)
5console.log(a)

Variables

—

Output

…

This only defines the function; nothing runs yet.

What's the output?

function double(n) {
  return n * 2
  console.log("done")
}
console.log(double(4))

What will this code print?

Complete the code

Complete the function that returns the bigger of two numbers.

function max(a, b) {
  if (a > b) {
     a
  }
  return 
}

Exercise

Write greet(name) that returns Welcome, <name>!, then print greet("Ali").

Expected output: Welcome, Ali!

JavaScript

function greet(name) {
  
}

Learn more from

Played 0 of 3 games