This is documentation for Mathematica 6, which was
based on an earlier version of the Wolfram Language.
View current documentation (Version 11.2)


As of Version 6.0, Random has been superseded by the functions RandomReal and RandomInteger.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.
Random[type, range]
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 n-digit 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.
New in 1