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Example of Ruby conditionals
Control Structures example from a Well House Consultants training course
More on Control Structures [link]
Source code: condi.rb Module: R104
print "Please enter an integer " value = gets.chomp.to_i print "Testing the number #{value}\n" # normal if, with elif and else if value > 5 puts "Value is greater than 5" elsif value > 2 puts "Greater that 2 but less than 5" else puts "Less than or equal to 2" end # an if that's a code modifier puts "That's very big" if value > 10 # An unless and else unless value > 5 puts "Value is not greater than 5" else puts "That's greater that 5" end # an unless that's a code modifier puts "That's not very big" unless value > 10 # Case - any one condition (or 'else' if none # of the conditions matches exactly) case value when 1,21,31 suffix = "st" when 2,22 suffix = "nd" when 3,23 suffix = "rd" else suffix = "th" end puts "It is the #{value}#{suffix} of the month" __END__ Sample output: WomanWithCat:r104 grahamellis$ ruby condi.rb Please enter an integer 10 Testing the number 10 Value is greater than 5 That's greater that 5 That's not very big It is the 10th of the month WomanWithCat:r104 grahamellis$ Learn about this subject
This module and example are covered on the following public courses:
* Learning to program in Ruby * Ruby Programming Also available on on site courses for larger groups Books covering this topic
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