Ruby/Statement/unless
Материал из Wiki.crossplatform.ru
Содержание |
Syntax of the full unless statement:
unless Boolean [then | :] code ] [else code ] end
To get the opposite effect of if you can use the word unless:
age = 24 puts "You"re NOT a teenager" unless age > 12 && age < 20
unless can work in exactly the same way because unless is just the opposite of if:
age = 10 unless age >= 18 puts "You"re too young to use this system" puts "So we"re going to exit your program now" exit end
unless statement simply operates in the logically reverse sense from the if statement
temperature = 76 unless temperature < 65 || temperature > 85 puts "Picnic time!" else puts "Sorry, no picnic today." end
