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Challenges

Comments on Roll n fair dice

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Roll n fair dice

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Challenge

This is a simple randomness challenge: Given a non-negative integer $n$, and positive integer $m$, simulate rolling and summing the results of $n$ fair dice, each of which have $m$ sides numbered $1$ through $m$.

Here is a basic ungolfed example in Python:

from random import randint
def roll(n, m):
    return sum([randint(1, m) for i in range(n)])

Try it online! (Also includes a basic visualization of the resulting distribution)

This is code golf, so shortest code wins!

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J, 10 7 bytes

+/>:?#/

Try it online!

+/>:?#/
     #/ : Inserts dyadic # into an array n m
          Creates n copies of m
    ?   : Roll from 0..y
  >:    : Increment
+/      : Sum reduce

-3 bytes thanks to torres.

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1 comment thread

This works, too: +/>:?$/ n m (2 comments)
This works, too: +/>:?$/ n m
torres‭ wrote over 2 years ago

This works, too: +/>:?$/ n m

south‭ wrote over 2 years ago

Thanks for that, a non-tacit solution is smarter.