What is a function parameter?

A function parameter is a variable that is defined in the function's signature, and it allows the function to accept values (also known as arguments) when it is called. The primary purpose of a function parameter is to enable the function to operate with different data inputs, providing flexibility and reuse of the code. When you define a function, you specify the parameters that it will receive, which can then be utilized within the function's body to perform operations.

Parameters are essential as they act as placeholders for the values that will be passed into the function during its execution. This means that when the function is invoked, the actual values supplied will replace the parameter placeholders, allowing the function to process that data accordingly. This dynamic capability is what makes functions powerful tools in programming, enabling code modularity and enhancing readability and maintenance.

In contrast, a fixed value used within a function refers to constants or literals that do not change, which do not offer the same level of flexibility as parameters. Errors invoked during function execution relate to issues that arise while the function is running, not to how the function is defined or called. Lastly, the return type of a function indicates the kind of value that the function will return upon execution, which is separate from the concept of parameters