the difference between return method and a simple method

Question

static void doSomething(int x) {
System.out.println(x*x);
}
this method returns a value without adding that "return" to it .
please to receive your answers :)

Answer 1

This method doesn't return any value (its return type is void). It just gets an integer value as an argument and then multiply and print it out to console.

Answer 2

Many thanks Schindlabua. As always very thorough and informative.

Answer 3

check this:

static void printSquare(int x){
System.out.println(x*x);
}

static int returnSquare(int x){
return x*x;
}

now:

System.out.println(returnSquare(2) + returnSquare(3));

will print 13 (4+9), while

Systrm.out.println(printSquare(2) + printSquare(3));

doesn't even work.

In programming you want to re-use code as often as possible so you don't have to write the same code twice, and that's why return is so useful.

Answer 4

With methods that return some value / object you can assign that value / object to a local varijable... An extra simple example would be:
int valueFromMethod = methodThatReturnsIntValue();

int methodThatReturnsIntValue(){
return 2;
}

With void methods you can't do that as they don't return value / object.