title: multiple step math equations python
body: <p>I'm trying to write a program that prompts the user to enter two numbers and then have the system figure out the sum, difference, product and quotient of the given numbers and print the results out. This is what I have so far. When I ran the code for sum it came back correct, when I added the difference function it doesn't work. </p>
  
  <pre><code>def total_sum(num1,num2):
  result = num1 + num2
  return result
  
  def total_difference(num_1,num_2):
      result = num_1 - num_2
      return result
  
  def total_product(number1,number2):
      result = number1 * number2
      return result
  
  def total_quotient (number_1,number_2):
      result = number_1 / number_2
      return result
  
  def main ():
     value_1 = float(input('Enter a number :'))
     value_2 = float(input('Enter second number :'))
     value_2 != 0
  
     add = total_sum(value_1,value_2)
     difference = total_difference(value_1, value_2)
     product = total_product(value_1,value_2)
     quotient = total_quotient(value_1,value_2)
  
     print ('The total is {:.1f}'.format(add))
     print ('The difference is {:.1f}'.format(difference))
     print ('The product is {:.2f}' .format(product))
     print ('The quotient is {:.2f}'.format(quotient))
  
  main()
  </code></pre>