Difference between revisions of "RAND()"

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==Syntax==
 
==Syntax==
RAND(<expN>)
+
RAND([<expN>])
  
  

Revision as of 09:11, 2 June 2009

Class

Numeric Data


Purpose

Function to return a random number


Syntax

RAND([<expN>])


See Also

GETPID(), TMPNAM(), SET COMPATIBLE, SYS()


Description

The RAND() function returns a number in the range 1 to 2147483647. Subsequent calls to RAND() will produce different numbers, but the sequence of numbers will be the same each time.

With SET COMPATIBLE set to FOXPRO | FOXBASE | VFP the number range is between 0 and 1 and a seed can be specified in <expN>. Using the same positive value in <expN> and omitting it in subsequent calls to the RAND() function will return the same sequence of numbers. Using a negative value in <expN> creates a seed based on the system clock, so subsequent RAND() calls will produce a different sequence of values.


Example

? rand()
     31466
 
set compatible to foxpro
? rand(-1)
      0.66
? rand()
      0.73


Products

Recital Database Server, Recital Mirage Server, Recital Terminal Developer