fmaxf

fmaxf is a function in the C standard library that returns the maximum of two single-precision floating-point values. It is declared in the header <math.h> and is part of the family of floating-point min/max utilities that also includes fminf and the double-precision equivalents fmax and fmin.

Prototype: float fmaxf(float x, float y);

Behavior: The function compares x and y and returns the larger value according to IEEE 754 arithmetic. If one argument is NaN, the function returns the non-NaN argument; if both are NaN, the result is NaN. If the values compare equal, the function returns that value. For signed zero, the maximum of +0.0 and -0.0 is +0.0.

Functionality with infinities: If either value is positive infinity, the result is +infinity; if both are finite, returns the larger finite value; if both are -infinity, returns -infinity.

Portability and usage: fmaxf is defined by the C standard (ISO/IEC 9899) and is commonly implemented on platforms with IEEE 754 support. Link against the math library as required (often with -lm).

See also: fminf, fmax, fmin.