What is difference printing to screen and returning a value?

Question

void horn() {
System.out.println("Beep!");
}

Here is example. As I know void does not return anything, and what does println means then? What will it do?

Answer 1

print, println and printf output stuff on the console, strings generally.

The return in the other hand is just a value, can be any data type, and it is not displayed on console. The return is there to use. for example

int num = 2 + Math.sqrt(4);

The return of sqrt is the square root of 4 in this case, which is 2 + 2 = 4 so the var num equals 4

Answer 2

Since void means that nothing can be returned by the method, you can't add a return statement to the horn() method. Thus, in a void method, the println() method (which prints a line of text to the screen.) is used in place of the return statement.

Answer 3

Thanks guys!