title: While loop user input?
body: <p>Instructions: Create a program that asks a user to enter a series of numbers. The user should enter a negative number to signal the end of the series. After all the positive numbers have been entered, the program should display their sum.</p>
  
  <p>I am using Python 2, Python IDLE</p>
  
  <p>I'm using a while loop for this assignment. So far, I made a program that is saying, while the user enters a positive number under the while loop, collect that number and keep adding it until the user enters a negative number. I am trying to find a way to include the first user input into the program.</p>
  
  <pre><code>print('This program calculates the sum of the numbers entered and ends 
  after inputting a negative number')
  total = 0.00
  number = float(input('Enter a number: '))
  while number &gt;= 0:
      print('Enter another positive value if you wish to continue. Enter a 
      negative number to calculate the sum.')
      number = float(input('Enter a number: '))
      total = total + number
  print('The sum is', total)
  </code></pre>