Dev
Mentor
Coach Interview AI
Mock Interview AI
Coding Problems
Blog
Pricing
Toggle theme
Sign In
Get Started
Toggle theme
Loading...
For the best coding experience, use a desktop browser.
Easy
Hash Table
Happy Number
Repeatedly sum squares of digits until you reach 1 (happy) or loop.
Examples
Input:
n = 19
Output:
true
Sample Test Cases
Case 1 Input:
19
Expected:
true
Case 2 Input:
2
Expected:
false
Reset
Run
Submit
Loading editor...
Test Case
Output
Submission
Case 1 Input:
19
Expected:
true
Case 2 Input:
2
Expected:
false