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 to work with 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
• longdouble variant XXXl
• complex function:
• float variant cXXXf
• double variant cXXX
• longdouble variant cXXXl

Bit manipulation (since C23)

The header <stdbit.h> provides macros and functions to work with the byte ordering and byte and bit representation of C objects.

Checked integer arithmetic (since C23)

Provides some type-generic macros for checked integer arithmetic:

See also