Numerics

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

Contents 1 Common mathematical functions 2 Floating-point environment 3 Pseudo-random number generation 4 Complex number arithmetic 5 Type-generic math 6 Bit manipulation (since C23) 7 Checked integer arithmetic (since C23) 8 See also

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
• long double variant XXXl

• complex function:

• float variant cXXXf
• double variant cXXX
• long double 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:

Defined in header <stdckdint.h>
ckd_add (C23)	checked addition operation on two integers (type-generic function macro)
ckd_sub (C23)	checked subtraction operation on two integers (type-generic function macro)
ckd_mul (C23)	checked multiplication operation on two integers (type-generic function macro)

See also

C++ documentation for Numerics library