What is the purpose of a function prototype?

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Multiple Choice

What is the purpose of a function prototype?

A function prototype tells the compiler about a function’s signature—its return type, name, and parameter types—so you can use the function before its actual definition. This lets you call the function from different parts of the code (or from other files) and still have the compiler check that you’re passing the right number and types of arguments and handling the return value correctly. It doesn’t provide the function’s implementation or allocate memory for it, and it’s not about runtime checks by itself—the main role is enabling forward references and type-safe calls by declaring how to use the function in advance.

A function prototype tells the compiler about a function’s signature—its return type, name, and parameter types—so you can use the function before its actual definition. This lets you call the function from different parts of the code (or from other files) and still have the compiler check that you’re passing the right number and types of arguments and handling the return value correctly. It doesn’t provide the function’s implementation or allocate memory for it, and it’s not about runtime checks by itself—the main role is enabling forward references and type-safe calls by declaring how to use the function in advance.

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