The Infinite Loops

You must use caution when using while loops because of the possibility that this condition never resolves to a false value. This results in a loop that never ends. Such a loop is called an infinite loop.

An infinite loop might be useful in client/server programming where the server needs to run continuously so  that client programs can communicate with it as and when required.

Example:

Following loop will continue till you enter CTRL + C

#!/usr/bin/python

var = 1

while var == 1 :  #This construct an infinite loop

     num = raw_input (“Enter a number  :”)

    print “You entered: ”, num

print “Good bye!”

This will produce following result:

Enter a number  :20

You entered: 20

Enter a number  :29

You entered: 29

Enter a number  :3

You entered: 3

Enter a number between : Trackback  (most recent call last):

   File “text.py”, line 5, in <module>

    num = raw_input(“Enter a number : ”)

keyboardInterrupt