Pseudo-random number generation

 

C

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Headers

Type support

Program utilities

Variadic function support

Error handling

Dynamic memory management

Strings library

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Date and time utilities

Input/output support

Localization support

Concurrency support (C11)

Technical Specifications

Symbol index

 

Numerics

Common mathematical functions

Floating-point environment (C99)

Pseudo-random number generation

Complex number arithmetics (C99)

Type-generic math (C99)

 

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

• C17 standard (ISO/IEC 9899:2018):

• 7.22.2 Pseudo-random sequence generation functions (p: 252-253)

• 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