👉 In computer science, a prerequisite is an instruction or requirement that must be followed before another instruction or requirement can be executed. It is often used to indicate what needs to be done before a function or method can be called. For example: ```python def add(a, b): print("Adding", a, "and", b) ``` In this code, the `add` function requires that `a` and `b` are both numbers. Without these prerequisites, the function will