Python Programming – John Zelle: Chapter 2 ex. 11

Write an interactive Python calculator program. The program should allow the user to type a mathematical expression, and then print the value of the expression. Include a loop so that the user can perform many calculations (say, up to 100). Note: To quit early, the user can make the program crash by typing a bad expression or simply closing the window that the calculator program is running in. You’ll learn better ways of terminating interactive programs in later chapters.

I modified the exercise to allow the user to either ask another question or quit the loop.