The Nested if…elif…else Construct:

There may be a situation when you want to check for another condition after a condition resolves a condition resolves to true. In such a situation, you can use the nested if construct.

In a nested if construct, you can have an if…elif…else construct inside another if…elif…else construct.

The syntax of the nested if…elif…else construct may be:

If expression1:

            statement(s)

If expression2:

            statement(s)

elif expression3:

            statement(s)

else

            statement(s)

elif expression4:

            statement(s)

else:

            statement(s)

Example:

#!/usr/bin/python

Var = 100

If var < 200

  print “Expression value is less than 200”

if var == 150:

  print “which is 150”

elif var == 100:

   print “Which is 100”

elif  var == 50:

   print  “Which is 50”

elif var < 50:

    print  “Expression value is less than 50”

else:

   print  “could not find true expression ”

print  “Good bye!”

This will produce following result:

Expression value is less than 200

Which is 100

Good bye!