fmax, fmaxf, fmaxl - determine maximum numeric value of two floating-point numbers
double fmax(double x, double y);
float fmaxf(float x, float y);
long double fmaxl(long double x, long double y);
[CX] The functionality described on this reference page is aligned with the ISO C standard. Any conflict between the requirements described here and the ISO C standard is unintentional. This volume of POSIX.1-2017 defers to the ISO C standard.
These functions shall determine the maximum numeric value of their arguments. [MX] NaN arguments shall be treated as missing data: if one argument is a NaN and the other numeric, then these functions shall choose the numeric value.
Upon successful completion, these functions shall return the maximum numeric value of their arguments.
[MX] If just one argument is a NaN, the other argument shall be returned.
If x and y are NaN, a NaN shall be returned.
No errors are defined.
First released in Issue 6. Derived from the ISO/IEC 9899:1999 standard.
Austin Group Interpretation 1003.1-2001 #007 is applied.
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