Python Conditional Statements Tutorial - Truthy and Falsy Values

Learn Python conditional statements with this comprehensive tutorial. Master if, elif, and else with examples, syntax, and practical tasks for beginners..

In Python, some values are treated as True or False automatically when used in conditions.

Falsy values (evaluated as False):

• None
• False
• 0 (any numeric zero)
• "" (empty string)
• [] (empty list)
• {} (empty dict)
• set() (empty set)

Everything else is truthy.

username = ""

if username:
    print("Welcome,", username)
else:
    print("Please enter a valid username")

Since username is an empty string (""), it’s falsy — the else block runs.

✅ Quick Practice Example

score = 75

if score:
    if score >= 90:
        print("Grade A")
    elif score >= 75:
        print("Grade B")
    else:
        print("Grade C")
else:
    print("No score provided")