Numerics
From cppreference.com
The C numerics library includes common mathematical functions and types, as well as optimized numeric arrays and support for random number generation.
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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 povides types and functions about complex numbers.
Type-generic math
The header tgmath.h provides standare C library type-generic mathematical functions by adding f for float, none for double, l for long double or c for complex.
See also
| C++ documentation for Numerics library
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