# slaran.f - Man Page

TESTING/MATGEN/slaran.f

## Synopsis

### Functions/Subroutines

real function **slaran** (iseed)**SLARAN**

## Function/Subroutine Documentation

### real function slaran (integer, dimension( 4 ) iseed)

**SLARAN**

**Purpose:**

SLARAN returns a random real number from a uniform (0,1) distribution.

**Parameters***ISEED*ISEED is INTEGER array, dimension (4) On entry, the seed of the random number generator; the array elements must be between 0 and 4095, and ISEED(4) must be odd. On exit, the seed is updated.

**Author**Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

**Further Details:**

This routine uses a multiplicative congruential method with modulus 2**48 and multiplier 33952834046453 (see G.S.Fishman, 'Multiplicative congruential random number generators with modulus 2**b: an exhaustive analysis for b = 32 and a partial analysis for b = 48', Math. Comp. 189, pp 331-344, 1990). 48-bit integers are stored in 4 integer array elements with 12 bits per element. Hence the routine is portable across machines with integers of 32 bits or more.

Definition at line **66** of file **slaran.f**.

## Author

Generated automatically by Doxygen for LAPACK from the source code.

## Referenced By

The man page slaran(3) is an alias of slaran.f(3).

Tue Nov 28 2023 12:08:43 Version 3.12.0 LAPACK