Why functions are needed in Javascript - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a function named greet.

Javascript

function [1]() {
  console.log('Hello!');
}

Drag options to blanks, or click blank then click option'

AsayHello

Bgreet

Chello

Dwelcome

Attempts:

3 left

💡 Hint

Common Mistakes

Using a different function name than asked.

The function name should be greet as asked.

2fill in blank

medium

Complete the code to call the function greet.

Javascript

[1]();

Drag options to blanks, or click blank then click option'

Agreet

Bwelcome

Chello

DsayHello

Attempts:

3 left

💡 Hint

Common Mistakes

Calling a function name that was not defined.

To call the function named greet, write greet().

3fill in blank

hard

Fix the error in the function call to greet.

Javascript

greet[1];

Drag options to blanks, or click blank then click option'

A()

B{}

C[]

D;

Attempts:

3 left

💡 Hint

Common Mistakes

Using braces or brackets instead of parentheses.

Functions are called with parentheses (). Missing them causes an error.

4fill in blank

hard

Fill both blanks to create a function that adds two numbers and returns the result.

Javascript

function add(a, b) {
  return a [1] b[2];
}

Drag options to blanks, or click blank then click option'

A*

B-

C+

D/

Attempts:

3 left

💡 Hint

Common Mistakes

Using subtraction or multiplication instead of addition.

Adding extra characters after the second variable.

The operator to add two numbers is +. No extra character is needed after b.

5fill in blank

hard

Fill all three blanks to create a function that takes a name and prints a greeting.

Javascript

function [1]([2]) {
  console.log('Hello, ' + [3] + '!');
}

Drag options to blanks, or click blank then click option'

Agreet

Bname

DsayHello

Attempts:

3 left

💡 Hint

Common Mistakes

Using different names for the parameter and inside the message.

Using a different function name than asked.

The function name is greet, the parameter is name, and the same parameter is used inside the message.