How to use a method that is within a class and sums two numbers in Ruby

Question

class Soma

def somar(num1, num2)

    @num1 = num1
    @num2 = num2
    result = num1 + num2

    puts "O resultado é #{result}"
end

end

summing = sum.new (1, 2)

I can’t understand why the following code doesn’t work.

Answer 1

First you have to create an instance of the class and then call the desired method. So:

class Soma
    def somar(num1, num2)
        @num1 = num1
        @num2 = num2
        result = num1 + num2
        puts "O resultado é #{result}"
    end
end

somando = Soma.new()
somando.somar(1, 2)

Behold working in the ideone. And in the repl it.. Also put on the Github for future reference.

Just note that this makes no sense. You shouldn’t create a class for this, you should do it much simpler and more correctly by separating the calculation from the printing, so:

def somar(num1, num2)
    return num1 + num2
end
 
puts "O resultado é #{somar(1, 2)}"

Behold working in the ideone. And in the repl it.. Also put on the Github for future reference.