# Difference between revisions of "random"

1.00
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### Description

Description:
Random real (floating point) value from 0 (inclusive) to x (not inclusive).

### Syntax

Syntax:
Number = random x
Parameters:
x: Number
Return Value:
Number

### Examples

Example 1:
`_rNumber = random 1;`
Example 2:
`_rNumber = random -10;`
Example 3:
To select random value from an array: ```_array = ["apples", "pears", "bananas", "M16"]; _random = _array select floor random count _array;```

Math Commands
Groups:
Uncategorised

### Notes

i
Only post proven facts here. Report bugs on the Feedback Tracker and discuss on the Arma Discord or on the Forums.
• Be careful using random numbers in multiplayer, each client will come up with a different result. See multiplayer tutorials for more general information about locality.
• The number returned is unlikely to be a whole number.
To return a whole number use either round, ceil or floor together with random:
x=round(random 5) will return 0,1,2,3,4 or 5. (non-uniform distribution, 0 and 5 are half as likely to be selected than any of the other numbers)
x=floor(random 5) will return 0,1,2,3 or 4. (uniform distribution, all numbers have the same probability of being selected)
x=ceil(random 5) will return 0,1,2,3,4 or 5. (0 is very unlikely, but possible, as ceil 0 is 0)
Posted on July 12, 2015 - 20:32 (UTC)
Hcpookie
Random selections including negative numbers can be obtained via: Failed to parse (PNG conversion failed; check for correct installation of latex and dvipng (or dvips + gs + convert)): _Xrnd = round(random 200) -100; This will yield numbers between -100 and 100.