🟦 Not

The Not block flips a Boolean value (True/False): True becomes False, and False becomes True — like a switch that reverses itself.

It's useful whenever you want to trigger something only when a condition is NOT true.

📥 Inputs

• value (Boolean): The Boolean value to invert, which may come from a condition or a variable.

📤 Outputs

• value (Boolean): The inverted value (True becomes False, False becomes True).

💡 Example of use

Scenario: Prevent access to a secure area without a badge

1. A user attempts to open a secure door.
2. The system checks if the variable aBadge is True (the user has a valid badge).
3. The value of aBadge is connected to the value input of the Not block.
4. The output of the Not block is linked to a condition that triggers an alert.
5. Behavior:

• If aBadge = False (no badge), the Not block returns True → the alert is triggered.
• If aBadge = True (valid badge), the Not block returns False → access is authorized.

⚙️ Technical Details

• Logic operation: Pure inversion (!value in programming), compatible only with Boolean data.
• Error handling: If a non-Boolean value is provided, the block returns False by default.

Documented version: v1

Updated on: 06/09/2026