System.Random Function

Generates random numbers within a specified range.

Pascal

function Random(const ARange: Integer): Integer; overload;
function Random: Extended; overload;

C++

int Random(const int ARange);
Extended Random();

File

System

Description

In Delphi code, Random returns a random number within the range 0 <= X < Range. If Range is not specified, the result is a real-type random number within the range

Copy Code

0 <= X < 1.

To initialize the random number generator, add a single call Randomize or assign a value to the RandSeed variable before making any calls to Random.

Note: Because the implementation of the Random function may change between compiler versions, we do not recommend using Random for encryption or other purposes that require reproducible sequences of pseudo-random numbers.