30 JavaScript Basic Exercises for Beginners with Solutions

Master beginner JavaScript skills with our comprehensive list of top 30 exercises. Dive into coding challenges that improve your understanding and proficiency in JavaScript, setting a solid foundation for intermediate challenges. Start your journey to JavaScript mastery today!

Learning Objectives:

By the end of these exercises, you will have a foundational understanding of JavaScript basics, including variables, functions, loops, and basic DOM manipulation.

Exercise Instructions:

Start with the first exercise and attempt to solve it before checking the hint or solution.
Ensure you understand the logic behind each solution, as this will help you in more complex problems.
Use these exercises to reinforce your learning and identify areas that may require further study.

1. Print "Hello, World!" to the console.

Required Input:

"Hello, World!"

Expected Output:

Hello, World!

Code In Javascript

// Print "Hello, World!" to the console let message = "Hello, World!"; console.log();

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2. Declare a variable name and assign it your name. Print the variable.

Required Input:

"Alice"

Expected Output:

Alice

Code In Javascript

// Declare a variable and print it let name = "Alice"; console.log();

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3. Create two variables, a and b, assign them numbers, and print their sum.

Required Input:

a = 5, b = 10

Expected Output:

Code In Javascript

// Declare two variables and print their sum let a = 5; let b = 10; console.log();

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4. Write a program to find the length of a string stored in a variable str.

Required Input:

str = "Hello"

Expected Output:

Code In Javascript

// Declare a string variable and print its length let str = "Hello"; console.log();

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5. Create a variable num and check if it is even or odd.

Required Input:

num = 7

Expected Output:

Odd

Code In Javascript

// Check if number is even or odd let num = 7; if () { console.log("Even"); } else { console.log("Odd"); }

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6. Write a program to calculate the area of a rectangle given length and width.

Required Input:

length = 5, width = 10

Expected Output:

Code In Javascript

// Calculate and print area of a rectangle let length = 5; let width = 10; console.log;

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7. Create a function greet that accepts a name as a parameter and returns "Hello, [name]!"

Required Input:

name = "Alice"

Expected Output:

Hello, Alice!

Code In Javascript

// Define greet function function greet(name) { } console.log(greet("Alice"));

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8. Write a program to convert temperature from Celsius to Fahrenheit.

Required Input:

celsius = 30

Expected Output:

Code In Javascript

// Convert Celsius to Fahrenheit let celsius = 30; let fahrenheit = ; console.log(fahrenheit);

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9. Create a function to find the maximum of three numbers.

Required Input:

a = 3, b = 9, c = 6

Expected Output:

Code In Javascript

// Find the maximum of three numbers function maxOfThree(a, b, c) { return; } console.log(maxOfThree(3, 9, 6));

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10. Write a program that checks if a string is a palindrome.

Required Input:

str = "madam"

Expected Output:

true

Code In Javascript

// Check if a string is a palindrome let str = "madam"; let isPalindrome =; console.log(isPalindrome);

Run Code?

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