What error type occurs when a discount amount is incorrectly added instead of subtracted?

A logic error occurs in a program when the code runs without crashing but produces incorrect results due to flaws in the algorithm or logic used to perform calculations or make decisions. In this case, adding a discount amount instead of subtracting it indicates that the logic implemented for the discount calculation is faulty. The program executes, but the output does not match the intended functionality, which is to reduce the total price by the discount amount. This kind of error can be particularly insidious because it may not be immediately obvious to the programmer or user, as the program does not throw an error or crash but rather produces misleading results.

Conversely, run-time errors typically occur during execution due to illegal operations (like division by zero). Syntax errors arise from incorrect code format, which prevents the code from compiling, and compile errors are related to issues detected before execution, such as problems in the code structure. In this instance, those errors are not relevant, as the program is executing but yielding faulty calculations due to incorrect logic.