A function is a subprogram that can be defined by the user in his program. It is a complete program in
itself in the sense that its structure is similar to main() function except that the name main is replaced
by the name of the function. The general form of a function is given below:
<type> <name> (arguments)
where<type>: is the type of value to be returned by the function. If no value is returned, then
keyword void should be used.
<name>: is a user-dened name of the function. e function can be called from another
function by this name.
arguments: is a list of parameters (parameter is the data tha
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