Summary

Seeds the random number generator

Prototype

math.randomseed (n)

Description

Seeds the random number generator with an integer. Re-seed with the same number to regenerate the same sequences by calling math.random.

Seeding with os.time () is a common technique to make random numbers different each time. Be aware however that for cryptographic purposes, the time of day is hardly a secret.

math.randomseed (44)    -- fixed random seed
math.randomseed (os.time ())  -- randomize from whatever the time is

See Also ...

Lua functions

math.abs - Absolute value
math.acos - Arc cosine
math.asin - Arc sine
math.atan - Arc tangent
math.atan2 - Arc tangent of v1/v2
math.ceil - Next higher integer value
math.cos - Cosine
math.cosh - Hyperbolic cosine
math.deg - Convert from radians to degrees
math.exp - Raises e to a power
math.floor - Next smaller integer value
math.fmod - The modulus (remainder) of doing: v1 / v2
math.frexp - Break number into mantissa and exponent
math.huge - A huge value
math.ldexp - Compute m* 2^n
math.log - Natural log
math.log10 - Log to the base 10
math.max - The highest of one or more numbers
math.min - The lowest of one or more numbers
math.modf - Returns the integral and fractional part of its argument
math.pi - The value of pi
math.pow - Raise a number to a power
math.rad - Convert degrees to radians
math.random - Generate a random number
math.sin - Sine
math.sinh - Hyperbolic sine
math.sqrt - Square root
math.tan - Tangent
math.tanh - Hyperbolic tangent

Topics

Lua base functions
Lua bc (big number) functions
Lua bit manipulation functions
Lua coroutine functions
Lua debug functions
Lua io functions
Lua math functions
Lua os functions
Lua package functions
Lua PCRE regular expression functions
Lua script extensions
Lua string functions
Lua syntax
Lua table functions
Lua utilities
Scripting
Scripting callbacks - plugins

(Help topic: lua=math.randomseed)