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'\" t
.\" Copyright (c) 2025 Bruce Hill
.\" All rights reserved.
.\"
.TH Int.choose 3 2025-11-29 "Tomo man-pages"
.SH NAME
Int.choose \- binomial coefficient
.SH LIBRARY
Tomo Standard Library
.SH SYNOPSIS
.nf
.BI Int.choose\ :\ func(n:\ Int,\ k:\ Int\ ->\ Int)
.fi
.SH DESCRIPTION
Computes the binomial coefficient of the given numbers (the equivalent of `n` choose `k` in combinatorics). This is equal to `n.factorial()/(k.factorial() * (n-k).factorial())`.
.SH ARGUMENTS
.TS
allbox;
lb lb lbx
l l l.
Name Type Description
n Int The number of things to choose from.
k Int The number of things to be chosen.
.TE
.SH RETURN
The binomial coefficient, equivalent to the number of ways to uniquely choose `k` objects from among `n` objects, ignoring order.
.SH EXAMPLES
.EX
assert (4).choose(2) == 6
.EE
.SH SEE ALSO
.BR Tomo-Int (3)
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