The void type

The void data type always represents an empty set of values. The only object that can be declared with the type specifier void is a pointer.

You cannot declare a variable of type void, but you can explicitly convert any expression to type void. The resulting expression can only be used as one of the following:

• An expression statement
• The left operand of a comma expression
• The second or third operand in a conditional expression.

Related information

• Pointers
• Comma operator ,
• Conditional expressions
• Function declarations and definitions