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Ruby Ruby Basics (Retired) Ruby Methods Method Returns: Part 2

Posted by Tomasz Chiossi
Tomasz Chiossi
7,545 Points

Hi, I'm not sure and I don't know why I can't pass this challenge. I've got right answer showing on preview mode...

So someone know what I doing wrong here or what I didn't understand well... ?

Help. :)

method.rb 
def mod(a, b)
  #write your code here
  c = a / b
  return "The remainder of #{a} divided by #{b} is #{c}"
end

mod(4,2)

3 Answers

Jason Anello
Jason Anello
Courses Plus Student 94,610 Points

You have a couple of issues.

It's looking for the remainder so you should use % instead of /

Also, the example output has a period at the end of the string which you're missing. The challenge is looking for an exact match on the output.

Tomasz Chiossi
Tomasz Chiossi
7,545 Points

Yes I missed full stop there. That's working! Many thanks!

Alex Rainert
Alex Rainert
1,040 Points
Alex Rainert
Alex Rainert
1,040 Points

This answer was helpful for me. Would either of you be able to quickly explain with its "return" then the string rather than "puts"?

Thanks so much!

a

Jason Anello
Jason Anello
Courses Plus Student 94,610 Points

The reason return is used here is because the challenge is specifically requesting that you do that.

"... Use string interpolation to return the remainder inside the sentence. ..."

If it wanted you to use puts then it would have been something different like "print the string to the console" Then you would know to use puts instead of returning it.

It's not that return is right and puts is wrong but it's more about the requirements of the program or in this case the challenge.

In general, it's more useful to return a value from a function than it is to print it out. So you'll be doing return most of the time instead of puts. If you print it out, then that's it. It's lost and you can't do anything else with it.

If you return the value to the code that called the function, then you have more options. You can print that return value, or save it in a variable for further processing later or use it in an expression, etc...

Alex Rainert
Alex Rainert
1,040 Points
Alex Rainert
Alex Rainert
1,040 Points

Thanks so much for the thoughtful reply, Jason.

Terrence Beckham
Terrence Beckham
Courses Plus Student 879 Points
Terrence Beckham
Terrence Beckham
Courses Plus Student 879 Points

Great reply Jason. You cleared up a lot of confusion for me :)