Number of 1 Bits
Last updated
What is Number of 1 Bits?
Given a 32-bit integer, count how many bits are set to 1. You can check the last bit with a bitwise AND and shift right repeatedly, or use the trick n & (n-1) which clears the lowest set bit, counting until n becomes zero. This problem teaches you to inspect and clear individual bits, a fundamental bit manipulation skill.
Free resources to learn Number of 1 Bits
More in stage 20: Bit Manipulation
Number of 1 Bits: common questions
Can I learn Number of 1 Bits in Hindi?
This lesson is written in English. Once you sign in, open it in the interactive course and ask the AI tutor to explain Number of 1 Bits in Hindi or Hinglish. The tutor answers from this lesson’s own text, so it stays on the syllabus, and it runs on your own Google, OpenAI or Anthropic key.
Is this Number of 1 Bits tutorial for beginners?
It is lesson 126 of 137 in the free LeetCode roadmap, in stage 20, Bit Manipulation. If you are new to LeetCode, start from stage 1 and come back here in order; if you already know the earlier stages, this lesson stands on its own.