about function

Question

why if we change the int ( which is showed in parenthesis) to void for below code then output shows compilation error ??
#include <iostream>
using namespace std;

(int) timesTwo(int x) {
return x*2;
}

int main() {
cout << timesTwo(8) << endl;

cout <<timesTwo(5) << endl;

cout <<timesTwo(42) << endl;
}

Answer 1

void can't return any value, it just performs some tasks for the caller function. If you want to make it void, then print the result within it.

void timesTwo(int x) {
cout << x*2 << endl;
}

You can see this post if you are confused about when we need to return any value ^_^
https://www.sololearn.com/Discuss/342545/?ref=app

Answer 2

Thank you so much