# Difference between revisions of "random"

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Hover & click on the images for description

### Description

Description:
Description needed
Groups:
Math

### Syntax 1

Syntax:
Syntax needed
Parameters:
x: Number
Return Value:
Return value needed

### Syntax 2

Syntax:
random [min, mid, max] Template:Since
Parameters:
[min, mid, max]: Array
min: Number
mid: Number
max: Number
Return Value:
Number

### Syntax 3

Syntax:
seed random x Template:Since
Parameters:
seed: Number
x: Number
Return Value:
Number - value from 0 to x

### Syntax 4

Syntax:
seed random [x, y] Template:Since
Parameters:
seed: Number
[x, y]: Array position on the Perlin noise texture
x: Number
y: Number
Return Value:
Number - value from 0 to 1

### Examples

Example 1:
`_rNumber = random 1;`
Example 2:
`_rNumber = random -10;`
Example 3:
Generate a random position inside a circle (see also Example Code: Random Area Distribution) `_center getPos [_radius * sqrt random 1, random 360];`
Example 4:
To select random value from an array: ```_array = ["apples", "pears", "bananas", "M16"]; _random = _array select floor random count _array; // Template:Since _random = selectRandom _array;```

### Additional Information

See also:
selectRandomselectRandomWeighted

### Notes

Report bugs on the Feedback Tracker and/or discuss them on the Arma Discord or on the Forums.
Only post proven facts here! Add Note
Posted on July 12, 2015 - 20:32 (UTC)
Hcpookie
Random selections including negative numbers can be obtained via: `_Xrnd = round(random 200) -100;` This will yield numbers between -100 and 100.
• 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 22, 2018 - 12:58 (UTC+2)
Lou Montana
Repartition comparison
Formula 0 1 2 3 4 5 6 7 8 9
floor random 10; 10% 10% 10% 10% 10% 10% 10% 10% 10% 10%
floor random [0, 5, 10] 0% 2% 7% 17% 25% 25% 17% 7% 2% 0%
floor random [0, 10, 0] 0% 0% 1% 2% 5% 9% 14% 19% 24% 26%
floor random [0, 10, 5] 0% 0% 0% 1% 2% 5% 9% 16% 28% 38%