CODEWITHSUNDEEP
ruby
Quinton
Quinton

Reputation: 23

Using Interactive Ruby program, Closes when I enter things

I followed an example for this to start learning Ruby. The following code works inside of my text editor (Visual Studio Code). But when I open the file using the interactive ruby program. It doesn't seem to work.

puts "Hello there! Please enter a number to square: "
number = gets.chomp.to_i

def squared(number)
        squared = number * number
        return squared.to_s
end

puts "Your number is: " + number.to_s
puts "Your number squared is: " + square(number)

It prints out the initial "Hello there! Please enter a number to square:" But once I type a number and press enter, the program abruptly closes.

Upvotes: 2

Views: 236

Answers (1)

anothermh
anothermh

Reputation: 10546

The problem is that you're double-clicking the example.rb file, which opens in cmd.exe and then closes automatically when it is done executing example.rb. That is the normal behavior for Windows: cmd.exe closes automatically after running whatever application invoked it.

What you want to do instead is manually open a command prompt (cmd.exe) and then run your application with ruby example.rb. This will keep cmd.exe open after your application finishes running, because cmd.exe was not invoked by your application; it was invoked manually by you.

This will allow you to see the Your number is: output after your application has finished running. This output is still being printed when you double-click example.rb, but the window closes so quickly that you can't see it.

Additionally, your application has some errors in it. Specifically, you're attempting to call square(number) when you should be calling squared(number).

Here is your code cleaned up a little bit:

puts 'Hello there! Please enter a number to square: '
number = gets.chomp.to_i

def squared(number)
  number * number
end

puts "Your number is: #{number}"
puts "Your number squared is: #{squared(number)}"

Note the use of single quotes for strings that do not include string interpolation, the implicit return for the squared method, and string interpolation for the puts calls.

Upvotes: 1

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