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Sometimes the correct answer just isn’t the right answer. Calculator App ships with a secret weapon: Meme Mode — a togglable Easter egg layer that intercepts certain expressions and replaces the boring, accurate result with something much more important.

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Toggling Meme Mode

Type meme at the prompt to switch meme mode on or off. The calculator confirms the new state: 
> meme
Meme mode: ON 😂

> meme
Meme mode: OFF
When meme mode is ON, special expressions are caught by handle_meme() in meme.py before they reach the evaluator. When OFF, every expression — including the easter-egg ones — is evaluated normally and returns a correct result.

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Easter Eggs

9+10

The classic. 9+10 returns = 21 😂 instead of the mathematically defensible 19.

2+2

2+2 returns = 5 (quick maths). Big Brother approved.

1+1

1+1 returns = 11 (big brain). Concatenation, obviously.

67

Entering exactly 67 returns = THE MEME NUMBER 67! 🔥. No explanation needed.

41

Entering exactly 41 returns = 41! The answer to everything (almost) 🤔. Close enough.

Expression containing 67

Any expression that contains 67 is evaluated normally, then the result is annotated: = {result} (contains the legendary 67! 🔥).

Expression containing 41

Any expression that contains 41 is evaluated normally, then annotated: = {result} (contains 41! 🤔).

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Full Demo

> meme
Meme mode: ON 😂

> 9+10
= 21 😂

> 2+2
= 5 (quick maths)

> 1+1
= 11 (big brain)

> 67
= THE MEME NUMBER 67! 🔥

> 41
= 41! The answer to everything (almost) 🤔

> 67+1
= 68 (contains the legendary 67! 🔥)

> 41*2
= 82 (contains 41! 🤔)

> meme
Meme mode: OFF

> 9+10
= 19

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How It Works

handle_meme() in meme.py is called on every input line when meme_mode is True. Exact string matches are checked first; then substring checks handle expressions that merely contain 67 or 41: 
def handle_meme(line: str, meme_mode: bool):
    if not meme_mode:
        return None

    stripped = line.strip()

    if stripped == '9+10':   return "= 21 😂"
    if stripped == '2+2':    return "= 5 (quick maths)"
    if stripped == '1+1':    return "= 11 (big brain)"
    if stripped == '67':     return "= THE MEME NUMBER 67! 🔥"
    if stripped == '41':     return "= 41! The answer to everything (almost) 🤔"

    if '67' in stripped:
        result = calc(line)
        return f"= {result} (contains the legendary 67! 🔥)"
    if '41' in stripped:
        result = calc(line)
        return f"= {result} (contains 41! 🤔)"

    return None
When handle_meme() returns None, the input falls through to normal evaluation — so all non-Easter-egg expressions still compute correctly even in meme mode.
When meme mode is OFF, every expression — including 9+10, 2+2, and 67 — is evaluated normally by the standard calculator pipeline. Meme mode has zero effect on regular math.

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