Examples

Javascript examples

Open a snippet in the Javascript editor, press Run, and change the code. No account, no install.

All languages

• FizzBuzz in JavaScript

  Print 1 to 20, replacing multiples of 3 with Fizz, 5 with Buzz, and both with FizzBuzz. Run it online with no signup.

• Factorial in JavaScript

  Compute n! with a simple loop. A short JavaScript snippet you can run online instantly.

• Palindrome check in JavaScript

  Test whether a string reads the same forwards and backwards. Run this JavaScript palindrome checker online.

• Fibonacci sequence in JavaScript

  Print the first Fibonacci numbers with an iterative loop — no recursion, no install.

• Two Sum in JavaScript

  Find two numbers that add up to a target. A common interview warm-up you can run online.

• Reverse a string in JavaScript

  Reverse characters with spread syntax. A tiny JavaScript snippet for the online editor.