Python · Stage 3 – Making Decisions · Lesson 22 of 50

Nested if Statements

Place one small decision inside another decision.

has_account = True
password_ok = True
if has_account:
    if password_ok:
        print("Welcome")
Line-by-line explanation
  1. Two facts are stored.
  2. The outer if first checks for an account.
  3. The inner if is indented inside the outer block.
  4. Welcome appears only when both checks succeed.

Use nesting when the second question only makes sense after the first. For two simple facts, and may be clearer.