Variables not matching in if/else statement

Question

I am creating a method that makes you solve random math problems. Code is below:

def subtraction()
   puts "Your goal is to solve the math problem."
   # Asks if user is ready
   ready()

   a = rand(0..5)
   b = rand(0..5)
   c = a - b
   puts "what is #{a} - #{b}?"



   prompt; next_move = gets.chomp


     if next_move == c
       puts "Lucky guess!"
       water()       
    elsif next_move != c
      puts "The answer was: #{c}"
      dead("You suck at life")
    else 
      dead("You didn't type anything")
    end
end

I keep trying to run this and I keep getting the elsif option. Even though my variables match when I check with puts statements. I am not moving in the direction I want to. What am I doing wrong?

No error, it just keeps going to the els if statement. No moving on to the water() method — Xchel Hernandez
– Xchel Hernandez, Commented Feb 22, 2014 at 1:55

Arup Rakshit · Accepted Answer · 2014-02-22 01:59:17Z

3

Change

 next_move = gets.chomp

to

next_move = gets.chomp.to_i # gets.to_i will work also.

Kernel#gets will give you string, and you need to convert it to appropriate object as per your need, if your work is not with string object like this example. As per the line c = a - b, I am very much sure, you need to change your string object, that you are getting from stdin to an integer object. So you have to use String#to_i.

edited Feb 22, 2014 at 1:59

answered Feb 22, 2014 at 1:53

Arup Rakshit

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4 Comments

Xchel Hernandez Over a year ago

This worked. Thanks! Did it work because when I request gets.chomp it makes it an automatic string? Does #to_i make the input seen as an integer?

Xchel Hernandez Over a year ago

Thank you so much for your help. You kick ass. I understand that Kernal#gets returns a string object.

mdesantis Over a year ago

@XchelHernandez, if the anwser satisfies you you might want to check it as right

Xchel Hernandez Over a year ago

Sorry - super new and wasn't sure what to do. Thanks for the advice.

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