Function parameters in Javascript - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a function named greet that takes one parameter called name.

Javascript

function greet([1]) {
  console.log(`Hello, ${name}!`);
}

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

Amessage

Bname

Cgreeting

Duser

Attempts:

3 left

💡 Hint

Common Mistakes

Using a different parameter name than the one used inside the function.

Forgetting to add any parameter.

The function parameter should be named 'name' to match the usage inside the function.

2fill in blank

medium

Complete the code to call the function greet with the argument 'Alice'.

Javascript

greet([1]);

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

AAlice

B"Alice"

C'Alice'

Dname

Attempts:

3 left

💡 Hint

Common Mistakes

Passing the string without quotes, which causes a reference error.

Using a variable name instead of a string.

When passing a string argument, it must be enclosed in quotes.

3fill in blank

hard

Fix the error in the function definition to correctly set a default value for the parameter age.

Javascript

function showAge(age [1] 18) {
  console.log(`Age is ${age}`);
}

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

A=

B==

C:

D=>

Attempts:

3 left

💡 Hint

Common Mistakes

Using '==' instead of '=' for default parameters.

Using ':' or '=>' which are invalid here.

The correct syntax for default parameters uses a single equals sign '='.

4fill in blank

hard

Fill the three blanks to define a function multiply that takes two parameters and returns their product.

Javascript

function multiply([1], [2]) {
  return [1] [3] [2];
}

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

Aa

Bb

C*

D+

Attempts:

3 left

💡 Hint

Common Mistakes

Using the wrong operator like '+' instead of '*'.

Mixing up parameter names.

The function parameters are 'a' and 'b', and the operator to multiply is '*'.

5fill in blank

hard

Fill both blanks to create a function that returns an object with keys as parameter names and values as their values.

Javascript

function createObject([1], [2]) {
  return { [1]: [1], [2]: [2] };
}

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

Ax

By

Attempts:

3 left

💡 Hint

Common Mistakes

Using different names for keys and values.

Forgetting to include both parameters.

The parameters are 'x' and 'y'. The object keys and values use the same names.