How to restart a program in python?

Question

Im a student, and just started learning python a month back, so right now, I have only learnt the basics. My teacher had given me a question like this, and the problem is, I dont know how to rerun a program, suppose, after finding the area of a particular shape, I want it to loop back to printing the first statement. Is there any way of doing that without re-running the program using the "F5" key?

 print "1. Triangle"
 print "2. Circle"
 print "3. Rectangle"

 shape= input("Please Select the serial number =")

 if shape==1:
     a=input("Base =")
     b=input("Height =")
     area=0.5*a*b
     print area
 if shape==2:
     a=input("Radius =")
     area=3.14*a*a
     print area
 if shape==3:
     a=input("Width")
     b=input("Length")
     area=a*b
     print area

I would suggest learning python fully, from http://www.codecademy.com — Dagrooms, Jun 04 '15 at 16:48
The point is not to "restart" it, but to avoid exiting it in the first place. — Ignacio Vazquez-Abrams, Jun 04 '15 at 16:49
possible duplicate of [Asking the user for input until they give a valid response](http://stackoverflow.com/questions/23294658/asking-the-user-for-input-until-they-give-a-valid-response) — Bhargav Rao, Jun 04 '15 at 16:49
[While loops](https://wiki.python.org/moin/WhileLoop) are what you're looking for. — Vincent, Jun 04 '15 at 16:50
Your question is tagged with [tag:loops]. Why don't you use one? — TigerhawkT3, Jun 04 '15 at 16:54
@Dagrooms telling someone who starts their question with 'I just started learning python' to 'learn python fully' isn't constructive. That's what they're trying to do already. — dimo414, Jun 04 '15 at 17:01

score 0 · Accepted Answer · answered Jun 04 '15 at 17:21

If you want to restart, just use a simple while loop.

while True:
    # Your lovely code

Then just put some validation at the end:

    again = raw_input("Play again? ")
    if again.startswith('n') or again.startswith('N'):
        break
    else: 
        continue

How to restart a program in python?

1 Answers1