Conditional statements allow you to execute different blocks of code based on whether a condition is True or False. The primary conditional statements in Python are if, elif, and else.
If Statement
The if statement is used to check a condition. If the condition is True, the code block under the if statement runs.
x = 10
if x > 5:
print("x is greater than 5")Elif Statement
You can use multiple elif statements to check additional conditions if previous conditions are not met.
x = 10
if x > 15:
print("x is greater than 15")
elif x > 5:
print("x is greater than 5 but less than or equal to 15")Else Statement
The else statement executes a block of code if none of the preceding if or elif conditions are True. The else block runs if all previous conditions are False.
x = 10
if x > 15:
print("x is greater than 15")
elif x > 5:
print("x is greater than 5 but less than or equal to 15")
else:
print("x is less than or equal to 5")Nested If Statements
You can nest if, elif, and else statements within each other to create complex conditional logic. Nested if statements allow you to check multiple conditions at different levels.
x = 10
y = 20
if x > 5:
if y > 15:
print("x is greater than 5 and y is greater than 15")
else:
print("x is greater than 5 but y is not greater than 15")
else:
print("x is not greater than 5")Python If…Else Example Code
This program uses conditional statements to determine and print messages based on the value of the variable x.
# If statement
x = 10
if x > 5:
print("x is greater than 5")
# If...elif...else statement
if x > 15:
print("x is greater than 15")
elif x > 5:
print("x is greater than 5 but less than or equal to 15")
else:
print("x is less than or equal to 5")
# Nested if statements
y = 20
if x > 5:
if y > 15:
print("x is greater than 5 and y is greater than 15")
else:
print("x is greater than 5 but y is not greater than 15")
else:
print("x is not greater than 5")
Python Labs
