assert

An assertion is a statement used in programming to verify that a certain condition holds true at a specific point in the code. It acts as a checkpoint or safety net that checks if assumptions made by the programmer are correct. If the condition is true, the program continues normally. If it's false, the assertion typically causes the program to stop and report an error, helping identify bugs early. Assertions are useful for debugging and ensuring that your code behaves as expected during development and testing.