Jan 1, 2010 · The question might be a little emotional, but I don't think it's a bad question. I'm sure lots of people have looked for a built-in sign function, so it can be curious why there isn't one.

Jan 29, 2013 · One thing you can't assume is that negative numbers have a particular coding; sign-magnitude, one's complement and two's complement are well-known possibilities, but C doesn't …

Dec 15, 2009 · 112 It seems that most of the answers missed the original question. Is there a standard sign function (signum, sgn) in C/C++? Not in the standard library, however there is copysign which …

Oct 2, 2011 · Wonder if there are any nontrivial ways of finding number's sign (signum function)? May be shorter / faster / more elegant solutions than the obvious one var sign = number > 0 ? 1 : number …

Is there a (simple) way to get the "sign" of a number (integer) in PHP comparable to gmp_sign Docs: -1 negative 0 zero 1 positive I remember there is some sort of compare function that can do this but I'm …

Jul 22, 2015 · -1 Just out of curiosity, is there a way to get the sign of a number, any kind (but obviously a signed type), not just integer using some bitwise/masking, or other kind of, operation? That is …

Is there an easy way to determine the sign of a floating point number? I experimented and came up with this: #include <iostream> int main(int argc, char** argv) { union { float f; ch...

Mar 29, 2022 · The dollar sign is treated just like a normal letter or underscore (_). It has no special significance to the interpreter. Unlike many similar languages, identifiers (such as functional and …

Jul 21, 2014 · OP: Using (x >> 31) & 1 to extract the sign bit is, depending on the C implementation and the number of value bits in an int, either implementation defined, or undefined behaviour, or wrong.

Dec 21, 2012 · I'd like to get the sign of a float value as an int value of -1 or 1. Avoiding conditionals is always a good idea in reducing computational cost. For instance, one way I can think of would be to u...