IRAND — Integer pseudo-random number

IRAND(FLAG)

IRAND(FLAG) returns a pseudo-random number from a uniform distribution between 0 and a system-dependent limit (which is in most cases 2147483647). If FLAG is 0, the next number in the current sequence is returned; if FLAG is 1, the generator is restarted by CALL SRAND(0) ; if FLAG has any other value, it is used as a new seed with SRAND.

Parameters

I – Shall be a scalar INTEGER of kind 4.

Returns

The return value is of INTEGER(kind=4) type.

Standard:

GNU extension

Class:

Function

Syntax:

RESULT = IRAND(I)

Example:

program test_irand
  integer,parameter :: seed = 86456

  call srand(seed)
  print *, irand(), irand(), irand(), irand()
  print *, irand(seed), irand(), irand(), irand()
end program test_irand