Can we ignore function prototypes and just define all functions before main?

What happens when we call a function without the parentheses ()?

Does C allow Nested Functions (functions inside each other)?

What are the other terminologies for Parameter & Argument?

Why do people omit the Parameter Names in Function Prototypes?

Can we put Function Prototypes inside other functions?

Can we specify lengths for One Dimensional Arrays?

What is main's return value used for?