Listing_3.16.irb

>> soliloquy = "To be, or not to be, that is the question:"
>> soliloquy.include?("To be")        # Does it include the substring "To be"?
=> true
>> soliloquy.include?("question")     # What about "question"?
=> true
>> soliloquy.include?("nonexistent")  # This string doesn't appear.
=> false
>> soliloquy.include?("TO BE")        # String inclusion is case-sensitive.
=> false