As of Version 6.0, Random has been superseded by the functions RandomReal and RandomInteger.

gives a uniformly distributed pseudorandom Real in the range 0 to 1.

gives a pseudorandom number of the specified type, lying in the specified range. Possible types are: Integer, Real and Complex. The default range is 0 to 1. You can give the range {min,max} explicitly; a range specification of max is equivalent to {0,max}.


  • Random[Integer] gives 0 or 1 with probability .
  • Random[Complex] gives a pseudorandom complex number in the rectangle with corners 0 and 1+i.
  • Random[Complex,{zmin,zmax}] uses the rectangle defined by zmin and zmax.
  • Random[Real,range,n] generates a pseudorandom real number with ndigit precision. Both leading and trailing digits may be chosen as 0.
  • Random gives a different sequence of pseudorandom numbers whenever you run Mathematica. You can start Random with a particular seed using SeedRandom.
Introduced in 1988
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