Using in operator to check the membership

Membership checking

in is the membership operator.

It can be used in conditions, just like all the other comparison operators:

name = 'java2s.com'
if 's' in name: 
    print 'Your name contains the letter "s".' 
else: # w w w . ja  v  a 2  s.c o m
    print 'Your name does not contain the letter "s".' 

The code above generates the following result.