条件分岐構文

条件分岐

if文

if tmp > 10
	puts "Input num is over 10."
	puts tmp
elsif tmp < 0
	puts "Input num is under 0."
else
	puts "Else num."
end

unless文

unless tmp == 0
	puts "tmp is not zero."
else
	puts "tmp is zero."
end

記述の倒置

puts "Input num is even number." if     tmp % 2 == 0
puts "Input num is odd number."  unless tmp % 2 == 0

１行に記述

if tmp > 0 ;    puts "plus number." end
if tmp < 0 then puts "minus number." end