# rn2

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rn2(x)^{[1]} is a pseudo-random number function used in NetHack when a result should be unweighted. The range of values is between 0 and x-1 inclusive (that is, 0 ≤ rn2(x) < x).

For example, to simulate a percentage chance:

if (rn2(100) < chance) { ... }

Also,

!rn2(x)

is true with a 1/x probability.

See also rn1.

## References

**This page may need to be updated for NetHack 3.6.1.**

It may contain text specific to NetHack 3.4.3. Information on this page may be out of date.

**Editors:** After reviewing this page and making necessary edits, please change the {{nethack-343}} tag to {{nethack-361}} or {{noversion}} as appropriate.