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Python - If-Else Statement

📌 What You Will Learn

Define the if-else statement and when to use it
Write the syntax of if-else with proper indentation
Apply if-else in real-world examples like age validation and password checks
Use nested if-else when one decision depends on another
Use the short-hand ternary operator value_if_true if condition else value_if_false

The if-else statement chooses between two blocks of code. One block runs when the condition is true, and the other runs when it is false.

Only one of the two blocks executes at a time.

if condition:
    statements
else:
    statements

🐍Code Cell

Output

Even Number

If the condition changes to false, the else block runs instead.

We can place an if-else block inside another condition when one decision depends on another.

Python also supports a short-hand form called the ternary operator:

value_if_true if condition else value_if_false

This is useful when only a simple one-line choice is needed.

📝 Key Takeaways

The if-else statement chooses between two blocks of code
Only one of the two blocks executes at a time
The if block runs when the condition is True and the else block runs when it is False
Nested if-else places one condition inside another
The ternary operator is a one-line short-hand for if-else

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