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Python | if statement

schedule Aug 12, 2023
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ExampleMultiple If Statements
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If a particular condition evaluates to true, Python will perform a particular action:

if condition_is_true:
   perform particular action

Example

To check if a person is old enough to buy alcohol and tell them if they are:

age = 21
if age >= 20:
   print("We can confirm you are old enough to buy alcohol.")
We can confirm you are old enough to buy alcohol.

If they are not old enough nothing will be printed as the if statement evaluates to false:

age = 19
if age >= 20:
print("We can confirm you are old enough to buy alcohol.")
NOTE

All indented lines after an if statement will be executed if the condition evaluates to true.

Multiple If Statements

You can use multiple if statements to check multiple conditions:

ingredients = ['bread', 'tomato', 'bacon', 'lettuce']

if 'bread' in ingredients:
   print("Adding bread to your sandwich")
if 'tomato' in ingredients:
   print("Adding tomato to your sandwich")
if 'avocado' in ingredients:
   print("Adding avocado to your sandwich")

print("\nFinished making your sandwich")
Adding bread to your sandwich
Adding tomato to your sandwich
Finished making your sandwich
robocat
Published by Arthur Yanagisawa
Edited by 0 others
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Official Python Documentation
https://docs.python.org/3/tutorial/controlflow.html#if-statements
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