Project 4: Distance between Two Points

Project 4:  Assume four variables (x1, y1, x2, y2) have been initialized.  These variables refer to the coordinates of two points.  

Task: initialize a variable called 'distance' that represents the distance between the two points.  

Hint: Look at the picture above and think about the Pythagorean Theorem.

**If your code works for 5 test cases in a row, you can enter your e-mail address.