Create calculator.rb

calculator.rb

@@ -0,0 +1,81 @@
+puts "Hello user! Which operator would you like to use?
+1. add or +
+2. subtract or - 
+3. multiply or *
+4. divide or /
+5. exponents or **
+6. modulo or %
+Please choose an operator (name or symbol)"
+operator = gets.chomp.downcase.to_s
+
+until operator == "add" || operator == "+" || operator == "subtract" || operator == "-" || operator == "multiply" || operator == "*" || operator == "divide" || operator == "/" || operator == "exponents" || operator == "**" || operator == "modulo" || operator == "%"
+  puts "That's not a valid operator! Try again."
+  operator = gets.chomp.downcase.to_s
+end
+
+puts "Enter the first number: "
+num_one = gets.chomp.to_s
+# case num_one
+# when /\D/, ""
+#   puts "Invalid input. Please put an integer or a float:"
+#   num_one = gets.chomp
+# end
+
+puts "Enter the second number: "
+num_two = gets.chomp.to_s
+case num_two
+when /\D/, ""
+  puts "Invalid input. Please put an integer or a float:"
+  num_two = gets.chomp
+end
+
+num_one = num_one.to_i
+num_two = num_two.to_i
+
+if operator == "divide" || operator == "/" && num_one == 0 || num_two == 0
+  puts "Invalid. You can't divide by 0!"
+    until num_two != 0
+    puts "Put another second number:"
+    num_two = gets.chomp.to_i
+    end
+end
+
+def addition(num_one, num_two)
+  answer = num_one + num_two
+  puts "Great! #{num_one} + #{num_two} = #{answer}"
+end 
+def subtraction(num_one, num_two)
+  answer = num_one - num_two
+  puts "Great! #{num_one} - #{num_two} = #{answer}"
+end 
+def multiplication(num_one, num_two)
+  answer = num_one * num_two
+  puts "Great! #{num_one} * #{num_two} = #{answer}"
+end 
+def division(num_one, num_two)
+    answer = num_one / num_two
+  puts "Great! #{num_one} / #{num_two} = #{answer}"
+end 
+def exponent(num_one, num_two)
+  answer = num_one ** num_two
+  puts "Great! #{num_one} ** #{num_two} = #{answer}"
+end
+def modulos(num_one, num_two)
+  answer = num_one % num_two
+  puts "Great! #{num_one} % #{num_two} = #{answer}"
+end
+
+case operator
+  when "add", "+"
+  addition(num_one, num_two)
+  when "subtract", "-"
+  subtraction(num_one, num_two)
+  when "multiply", "*"
+  multiplication(num_one, num_two)
+  when "divide", "/"
+  division(num_one, num_two)
+  when "exponents", "**"
+  exponent(num_one, num_two)
+  when "modulo", "%"
+  modulos(num_one, num_two)  
+end