Running JavaScript in browser console - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to print 'Hello, world!' in the browser console.

Javascript

console.[1]('Hello, world!');

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

Awrite

Bprint

Cshow

Dlog

Attempts:

3 left

💡 Hint

Common Mistakes

Using console.print or console.write which do not exist.

Trying to use alert instead of console.

Use console.log to print messages to the browser console.

2fill in blank

medium

Complete the code to declare a variable named 'count' with value 5 and log it.

Javascript

let count = [1];
console.log(count);

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

A5

B'5'

Cfive

Dcount

Attempts:

3 left

💡 Hint

Common Mistakes

Putting the number 5 inside quotes, making it a string.

Using an undefined variable name instead of a number.

Use the number 5 without quotes to assign a numeric value.

3fill in blank

hard

Fix the error in the code to correctly log the sum of 3 and 4.

Javascript

console.log(3 [1] 4);

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

A-

B+

C*

D/

Attempts:

3 left

💡 Hint

Common Mistakes

Using minus or other operators that do not add.

Leaving out the operator entirely.

The plus sign + adds two numbers together.

4fill in blank

hard

Fill both blanks to create an array of numbers and log its length.

Javascript

const numbers = [[1]];
console.log(numbers[2]);

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

A1, 2, 3

Blength

Csize

Dcount

Attempts:

3 left

💡 Hint

Common Mistakes

Using words like 'size' or 'count' which are not valid properties.

Not separating numbers with commas.

Arrays are created with comma-separated values inside brackets. Use .length to get the number of items.

5fill in blank

hard

Fill all three blanks to create an object with a name property and log the name.

Javascript

const person = { [1]: [2] };
console.log(person.[3]);

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

Aname

B'Alice'

Dage

Attempts:

3 left

💡 Hint

Common Mistakes

Using different words for the property key and access.

Forgetting quotes around the string value.

Create an object with a property name set to 'Alice'. Access it with person.name.