The size of each variable is find using sizeof operator.
#include <iostream> using namespace std; int main() { cout << "Size of char: " << sizeof(char) << " byte" << endl; cout << "Size of int: " << sizeof(int) << " bytes" << endl; cout << "Size of float: " << sizeof(float) << " bytes" << endl; cout << "Size of double: " << sizeof(double) << " bytes" << endl; return 0; }
OutPut
Size of char: 1 byte Size of int: 4 bytes Size of float: 4 bytes Size of double: 8 bytes