Conditional Statements

Use if, elif and else to run code depending on a condition. Python uses indentation to define blocks.

conditionals.py

marks = 72

if marks >= 90:
    grade = "A"
elif marks >= 60:
    grade = "B"
else:
    grade = "C"

print(grade)  # B

Conditional expression

ternary.py

status = "adult" if age >= 18 else "minor"

0, "", [], {}, None and False are falsy. Everything else is truthy.

truthy.py

items = []
if not items:
    print("empty")

match.py

command = "stop"
match command:
    case "go":
        print("Going")
    case "stop":
        print("Stopping")
    case _:
        print("Unknown")