Can I use negative integers?

Answer 1

yes, unless it's unsigned.

Answer 2

actually, suppose if we write int a=-25,
then compiler accepted.. if we write unsigned int a=-29 or int a=-29, then compiler was not accepted because unsigned means not use any subtraction (-)...

Answer 3

obviously.....
by using unsigned.....

Answer 4

#include<iostream>
using namespace std;
int main()
{
int a=5, b=-2, x;
x=a+b;
cout<<"x= "<<x<<endl;
return 0;
}

output: x=3