Python - Control Flow

while

>> a = 0

>> while a < 10:    # or you can use a != 10

>>     a = a + 1

>>     print a

if - elif - else

>> a = 2

>> if a==2:

>>     print 'okey, the value of a is 2'

or

>> if a==2:

>>     print 'okey, the value of a is 2'

>> else:

>>     print 'nop, the value of a is not 2'

or 

>> if a==2:

>>     print 'value of a is 2'

>> elif a==3:

>>     print 'value of a is 3'

>> elif a>3:

>>     print 'value of a is greater than 3'

>> else:

>>     print 'value of a is not defined'

    

Python - Control Flow