December 2014
Beginner
336 pages
7h 41m
English
book
Learn Ruby the Hard Way: A Simple and Idiomatic Introduction to the Imaginative World of Computational Thinking with Code, Third Edition
by Zed A. Shaw
Content preview from Learn Ruby the Hard Way: A Simple and Idiomatic Introduction to the Imaginative World of Computational Thinking with Code, Third Edition
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Exercise 12. Prompting People for Numbers
You may have noticed in Exercise 11 that you were getting only strings from the user. How do you get numbers? Type this code in to find out how.
ex12.rb
1 print "Give me a number: " 2 number = gets.chomp.to_i 3 4 bigger = number * 100 5 puts "A bigger number is #{bigger}." 6 7 print "Give me another number: " 8 another = gets.chomp 9 number = another.to_i 10 11 smaller = number / 100 12 puts "A smaller number is #{smaller}."
What You Should See
Exercise 12 Session
$ ruby ex12.rb Give me a number: 10 A bigger number is 1000. Give me another number: 200 A smaller number is 2.
See how I can add a .to_i to ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.