Python Process Control If/for/while

There are no switch statements in Python

If statement

If condition:

Do STH

Elif Condition:

Do STH

Else

Do STH

The while statement has an optional ELSE clause

While condition:

Do STH

Else

Do STH

For loop

For I in range (1, 5): # that is sequence [1, 2, 3, 4]

Print I

Else

print ' The For loop was over '

Break statement

If you terminate from a for or while loop, any corresponding loop else blocks will not execute.

Try: Except statement handling exception

Import Sys

Try

s = raw_input (' Enter something--")

Except Eoferror:

print ' \nwhy did you do a EOF on me? '

Sys.exit () # Exit the program

Except

print ' \nsome error/exception occurred. '

# Here, we aren't exiting the program

print ' Done '

An exception can be thrown using the raise statement, which is equivalent to a throw in Java