Conditional Structure
Editor
if Statement
The if statement implements a simple conditional structure.
Syntax
if boolean_expression :
statement(s)
Example
discount = 0
amount = 1200
# Check the amount value
if amount > 1000 :
discount = amount * 0.1
print('Payable amount = ', amount - discount)
if else Statement
The if else statement implements a compound conditional structure.
Syntax
if boolean_expression :
statement(s)
else :
statement(s)
Example
amount = 1200
if amount > 1000 :
discount = amount * 0.2
else :
discount = amount * 0.1
print('Payable amount = ', amount - discount)
if elif else Statment
The if elif else statement implements a nested conditional structure.
Synatx
if expression1 :
statement(s)
elif expression2 :
statement(s)
elif expression3 :
statement(s)
else :
statement(s)
Implementation with if else
if expression1 :
statement(s)
else :
if expression2 :
statement(s)
else :
if expression3 :
statement(s)
else :
statement(s)
Example
amount = 2500
if amount > 10000 :
discount = amount * 20 / 100
elif amount > 5000 :
discount = amount * 10 / 100
elif amount > 1000 :
discount = amount * 5 / 100
else :
discount = 0
print ('Payable amount = ', amount - discount)
match-case Statement
The match-case statement implements a multiple conditional structure.
The basic use of the match-case statement is to compare a variable to several values.
Syntax
match variable_name :
case value_1 :
statement_1
case value_2 :
statement_2
...
case value_n :
statement_n
case _ :
statement_
Example: the following program displays the name of the day of the week corresponding to a given integer.
n = 5
match n :
case 1: print('Monday')
case 2: print('Tuesday')
case 3: print('Wednesday')
case 4: print('Thursday')
case 5: print('Friday')
case 6: print('Saturday')
case 7: print('Sunday')
case _: print('Invalid day number')