return statement syntax
>>-return--+--------------------------+--;---------------------><
'-+---+--expression--+---+-'
'-(-' '-)-'
A return statement ends the processing of the current function and returns control to the caller of the function.
A value-returning function should include a return statement,
containing an expression.
If an expression is not given on a return statement
in a function declared with a non-void return type, the
compiler issues an error message.
If the data type of the expression is different from the function return type, conversion of the return value takes place as if the value of the expression were assigned to an object with the same function return type.
For a function of return type void, a return statement
is not strictly necessary. If the end of such a function is reached
without encountering a return statement, control is passed
to the caller as if a return statement without an expression
were encountered. In other words, an implicit return takes place upon
completion of the final statement, and control automatically returns
to the calling function.
If
a return statement is used, it must not contain an expression.