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

Brandan Herron
Brandan Herron
4,825 Points

Ruby methods

In the previous challenge, we wrote a method that returned the remainder of two arguments when divided. That's cool, but it would be nicer if the method returned the remainder in a nice full sentence. Use string interpolation to return the remainder inside the sentence “The remainder of a divided by b is c.” where a is your “a” variable, b is your “b” variable, and c is the value of a % b.

Can someone help me with this?

def mod(a, b)
  #write your code here

1 Answer

Michael Hulet
Michael Hulet
47,909 Points

There are 2 key things you need to know to pass this challenge:

  1. How to do string interpolation
  2. How to use the modulo operator

String interpolation basically puts a value inside a string where you want it. In Ruby, this is done by wrapping the expression you want to be evaluated in #{} where you want it to be in the string. For example:

"5 times 8 is #{5 * 8}" #Evaluates to "5 times 8 is 40"

You can put any equation or method call or raw variable you want in there, and it'll be pasted into the string where it is, without the #{}

The other thing you need to know how to use is the modulo operator, which is just like the division operator, but it gives you the remainder of dividing the 2 numbers. The modulo operator is the percent sign (%). For example, 8 % 4 is 0 (4 goes into 8 twice with no remainder), and 7 % 3 is 1 (3 goes into 7 twice, with a remainder of 1)

Knowing all that, you just have to make your function return a string in the format that the challenge asks for