Multiple Decisions

By combining if and else we were able to create binary pathways. With another built-in conditional keyword, we can create multiple pathways in our code.

elif statement

elif is a built-in keyword related to if statements.

• elif can only exists if there is a related if statement above it

• elif can have its own condition, and it will execute its code block if the Boolean condition is True

• After the first if statement, you are allowed to have as many elif statements as you’d like

• It is recommended that your elif’s boolean condition is related to the condition that comes before it

# Code Format:
    if boolean_condition1:
        # code here

    elif boolean_condition2:
        # code here

    elif boolean_condition3:
        # code here

    else:
        # code here

NOTE:

• if boolean_condition1 is True, it will ignore the conditional statements below it

• if boolean_condition1 is False, it will check the 2nd condition

• if both boolean_condition1 and boolean_condition2 is False, it will check the 3rd condition

• if all the conditions evaluate to False, then the else’s code block will execute

# Example

age = 14

if age > 17:
    print('You are allowed to watch any movies.')
elif age >= 13:
    print('You can watch any movies with any rating with exception of:')
    print('-- You cannot watch NC-17.')
    print('-- You require parent/adult guaradian supervision to watch R rated movies.')
else:
    print('You can watch G rated movies and you also need parental guidance for PG and PG-13 rated movies.')

Output:
You can watch any movies with any rating with exception of:
-- You cannot watch NC-17.
-- You require parent/adult guaradian supervision to watch R rated movies.