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# random()

1. 1. Synopsis
2. 2. Syntax
3. 3. Example 1
4. 4. Example 2
5. 5. Example 3

## Synopsis

Returns a random number. Random numbers are not truly random, since they use deterministic algorithms - they are more correctly referred to as pseudo-random. By specifying an initial value, or seed, a repeatable sequence of random numbers can be generated.

## Syntax

`random ( Optional seed As Integer = 0) As Any `
Argument Type Description
seed Integer Optional; seed value used to generate a repeatable series of pseudo-random numbers. The default is 0, which (generally) creates a pseudo-random series.

## Example 1

```Intent >random()
--> 0.19330423902097 ```

## Example 2

Using a seed

```Rule random1 As Number
random(seed := 1)
Return roundToNearest(random(), 0.001)
End Rule```

```Intent >random1
--> 0.564```
Evaluating the rule random1 will consistently return 0.564

## Example 3

Use in a loop

```Rule random2 As Number
random(seed := 2731774)

Dim result As List = {}
Dim i As Integer

For i = 1 to 9
result = result + {roundToNearest(random(), 0.001)}
Next i

Return result
End Rule```

```Intent >random2
--> {0.99, 0.29, 0.394, 0.7, 0.546, 0.352, 0.49, 0.154, 0.194}```
The rule random2 will consistently return this list of values.