Truthiness

Learn values considered true/false.

Python evaluates every value as bool. Falsy values: 0, 0.0, , [], None. Others are truthy.

name = "Alex"
if name:  # truthy
    print("Has a name")

This gives a very short way to say "if not empty". if text: is True when text is non-empty.

Checking the opposite with not

not flips the truthiness of a value. not name is True when name is empty.

name = ""
if not name:
    print("No name")

This is a short way to say "if empty". With if not text: you can check for an empty string, empty list or None.

Assign name = "Alex". Write if name: print("Has a name").

Show example solution

name = "Alex"
if name:
    print("Has a name")

Empty string check

name = "Alex"
if ____:
    print("Has a name")

Show answer

name = "Alex"
if name:
    print("Has a name")