# Difference between revisions of "random"

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m (Reverted edits by Heecf..... (talk) to last revision by Str) |
(Added probability clarification to round and floor.) |
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* 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. | * 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.<br>To return a whole number use either '''[[round]]''', '''[[ceil]]''' or '''[[floor]]''' together with '''random''':<br> | * The number returned is unlikely to be a whole number.<br>To return a whole number use either '''[[round]]''', '''[[ceil]]''' or '''[[floor]]''' together with '''random''':<br> | ||

− | x=round(random 5) will return 0,1,2,3,4 or 5. | + | 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. | + | 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) | + | x=ceil(random 5) will return 0,1,2,3,4 or 5. (0 is very unlikely, but possible, as ceil 0 is 0) |

<!-- Note Section END --> | <!-- Note Section END --> | ||

</dl> | </dl> |

## Revision as of 12:09, 28 December 2012

### Notes

- 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**: