ABL electronic PIC Microcontrollers PIC18 User Manual

void

is a special type indicating the absence of any value. There are no objects of

void

; instead, 

void

is used for deriving more complex types.

Use the 

void

keyword as a function return type if the function does not return a

value. For example:

print_temp(char temp) {

Lcd_Out_Cp("Temperature:");

Lcd_Out_Cp(temp);

Lcd_Chr_Cp(223);  

// degree character

Lcd_Chr_Cp('C');

}

Use 

void

as a function heading if the function does not take any parameters.

Alternatively, you can just write empty parentheses:

main(void) { 

// same as main()

...

}

Pointers can be declared as 

void

, meaning that they can point to any type. These

pointers are sometimes called generic.

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