Pseudo-random number generation

C

Language

Headers

Type support

Program utilities

Variadic function support

Error handling

Dynamic memory management

Date and time utilities

Strings library

Algorithms

Numerics

Input/output support

Localization support

Atomic operations (C11)

Thread support (C11)

Technical Specifications

Numerics

Common mathematical functions

Floating-point environment

Complex number arithmetics

Random number generation

Type-generic math

Pseudo-random number generation

rand

srand

RAND_MAX

Defined in header <stdlib.h>
rand	generates a pseudo-random number (function)
srand	seeds pseudo-random number generator (function)
RAND_MAX	maximum possible value generated by rand() (macro constant)

References

• C11 standard (ISO/IEC 9899:2011):

• 7.22.2 Pseudo-random sequence generation functions (p: 346-347)

• C99 standard (ISO/IEC 9899:1999):

• 7.20.2 Pseudo-random sequence generation functions (p: 312-313)

• C89/C90 standard (ISO/IEC 9899:1990):

• 4.10.2 Pseudo-random sequence generation functions

See also