Question

I’m new to both Ruby and programming in general.
I’ve been trying to put together a little script that randomly creates math questions and works them out as well, however I’m having trouble generating a random math operator.

My script so far:

num = (1..10).to_a

num1 = num.shuffle[0]
num2 = num.shuffle[0]

op = %w{+ - = /} 
op1 = op.sample

puts w = "#{num1} #{op1} #{num2}"

puts "Your answer is:"
answer = gets()

solution = num1 + "what do I put here??" + num2

if answer.to_i == solution
  puts "Correct! The answer is #{solution}"
else
  puts "Incorrect, the answer is #{solution}"
end

I’ve managed to pick out a random operator but can’t use it in the solution as it’s a string.

Answer 1

Why not use symbols, and send it to an operand with an argument?

5.send(:+, 10)

For example:

> syms = [:+, :-, :*, :/]
=> [:+, :-, :*, :/]
> num1.send(syms.sample, num2)
=> 50

Why’d you use sample for the ops, but not the numbers?