Numerics

The C numerics library includes common mathematical functions and types, as well as support for random number generation.

Common mathematical functions

The header math.h provides standard C library mathematical functions such as fabs, sqrt, and sin.

Floating-point environment

The header fenv.h defines flags and functions related to exceptional floating-point state, such as overflow and division by zero.

Pseudo-random number generation

The header stdlib.h also includes C-style random number generation via srand and rand.

Complex number arithmetic

The header complex.h provides types and functions about complex numbers.

Type-generic math

The header tgmath.h provides some macros for a function which names XXX:

• real function:
• float variant XXXf
• double variant XXX
• long double variant XXXl
• complex function:
• float variant cXXXf
• double variant cXXX
• long double variant cXXXl

See also