void C Keyword void Data type The keyword void indicates that the function does not return a value. Using void declarations makes programs clearer and is useful in error checking. For example, a function that prints an error message and calls exit to terminate a program should be declared void because it never returns. A function that performs a calculation and stores its result in a global variable (rather than returning the result), or one that returns no value, should also be declared void to prevent the accidental use of the func- tion in an expression. ***** See Also ***** C keywords COHERENT Lexicon Page 1