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How to count Count the number of set bits in a 32-bit integer?

8 bits representing the number 7 look like this:

00000111

Three bits are set.

What are the algorithms to determine the number of set bits in a 32-bit integer?

How to count the number of set bits in a 32-bit integer?

8 bits representing the number 7 look like this:

00000111

Three bits are set.

What are algorithms to determine the number of set bits in a 32-bit integer?

Count the number of set bits in a 32-bit integer

8 bits representing the number 7 look like this:

00000111

Three bits are set.

What are the algorithms to determine the number of set bits in a 32-bit integer?

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unutbu

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CSᵠ

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8 bits representing the number 7 look like this:

00000111

Three bits are set.

What are algorithms to determine the number of set bits in a 32-bit integer?

8 bits representing the number 7 look like this:

00000111

Three bits are set. What are algorithms to determine the number of set bits in a 32-bit integer?

8 bits representing the number 7 look like this:

00000111

Three bits are set.

What are algorithms to determine the number of set bits in a 32-bit integer?

algorithm binary integer bit-manipulation bitwise hammingweight iec10967

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Peter O.

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Restored tag which does not presuppose the answer but helps to describe the question (the question is about the best way to calculate the Hamming weight)

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edited Oct 4, 2012 at 18:40

Matt Howells

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removed tag that presupposes answer.

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Matt Howells

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How to count Count the number of set bits in a 32-bit integer?

How to count the number of set bits in a 32-bit integer?

Count the number of set bits in a 32-bit integer