if-else in Python

if-else chooses a path. The computer looks at a condition. If it is True, it runs the if block. If not, it tries elif, then else. Only the first true branch runs. That is how Pass/Fail and even/odd work.

Shape on the board: if n % 2 == 0: print("Even") else: print("Odd"). Colon after the condition. Body indented. Missing colon → SyntaxError. Wrong indent → IndentationError. = assigns; == compares. Freshers write if n = 2 and lose marks.

Let’s dry-run. n = 7. 7 % 2 is 1, not 0, so if is False. else runs. Output: Odd. Change n to 8 → Even. Say that out loud before you run. That is the viva.

elif is extra checks in order. marks >= 75 → A, elif >= 50 → B, else C. Don’t stack ten separate ifs when elif is the story.

if-else in Python — output — Odd. 7 % 2 is 1, not 0. Change n to 8 → Even.