Variable declaration using let in Javascript - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare a variable named age using let.

Javascript

[1] age = 25;

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

Alet

Bvar

Cconst

Dint

Attempts:

3 left

💡 Hint

Common Mistakes

Using var instead of let.

Using const which does not allow reassignment.

Using non-JavaScript keywords like int.

Use let to declare a variable that can change later.

2fill in blank

medium

Complete the code to declare a variable name and assign it the string 'Alice' using let.

Javascript

[1] name = 'Alice';

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

Aconst

Blet

Cfunction

Dvar

Attempts:

3 left

💡 Hint

Common Mistakes

Using const which prevents reassignment.

Using function which is not for variable declaration.

let declares a variable that can be changed later. Here, name is assigned the string 'Alice'.

3fill in blank

hard

Fix the error by completing the code to declare a variable count with let.

Javascript

let [1] = 10;

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

Alet

B10

Cvar

Dcount

Attempts:

3 left

💡 Hint

Common Mistakes

Using a number as a variable name.

Using keywords as variable names.

The variable name should be count. The keyword let is already used.

4fill in blank

hard

Fill both blanks to declare two variables x and y using let and assign them values 5 and 10.

Javascript

[1] x = 5; [2] y = 10;

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

Alet

Bconst

Dvar

Attempts:

3 left

💡 Hint

Common Mistakes

Using const which prevents reassignment.

Using var instead of let.

Use let before each variable to declare them properly.

5fill in blank

hard

Fill all three blanks to declare variables a, b, and c using let and assign them values 1, 2, and 3 respectively.

Javascript

[1] a = 1; [2] b = 2; [3] c = 3;

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

Alet

Bconst

Cvar

Attempts:

3 left

💡 Hint

Common Mistakes

Using const which prevents reassignment.

Using var instead of let.

Each variable is declared with let. The order of let keywords matches the blanks.