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4 billion if statements (andreasjhkarlsson.github.io)

submitted 10 months ago by [email protected] to c/[email protected]

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[–] [email protected] 2 points 10 months ago (2 children)

This is why every programmer needs to understand the modulo operator.

[–] [email protected] 3 points 10 months ago (1 children)

Or bitwise AND.

[–] [email protected] 2 points 10 months ago

This is what I prefer too! I also some times prefer to use bitshift when it comes to division or multiplication of power of 2.

[–] [email protected] 2 points 10 months ago (1 children)

I would divide by two (floating point) and check the fractional part.

[–] [email protected] 6 points 10 months ago (1 children)

turns out that 2^53 + 1 is an even number

[–] [email protected] 2 points 10 months ago

The article only covers unsigned 32-bit numbers, so floating point division would be fine.