Sha256: fd2e2f7642496719334aae178114b7d3582d3e895e702b11dddd18f194f69f53
Contents?: true
Size: 302 Bytes
Versions: 10
Compression:
Stored size: 302 Bytes
Contents
class Integer
# Calculate the factorial of an integer.
#
# 2.factorial #=> 2
# 3.factorial #=> 6
# 4.factorial #=> 24
#
# CREDIT: Malte Milatz
def factorial
return 1 if zero?
f = 1
2.upto(self) { |n| f *= n }
f
end
alias_method( :fac, :factorial )
end
Version data entries
10 entries across 9 versions & 2 rubygems