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# Python | if statement

schedule Aug 12, 2023
Last updated
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Python
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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 = 21if 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 = 19if 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 sandwichAdding tomato to your sandwichFinished making your sandwich ```
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