Comparing data values : Variables « Language Basics « C++ Tutorial

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2. Language Basics
3. Variables

#include <iostream>
using std::cin;
using std::cout;
using std::endl;

int main() {
  char first = 10;
  char second = 20;

  cout << "The value of the expression first < second is: "
       << (first < second)
       << endl
       << "The value of the expression first == second is: "
       << (first == second)
       << endl;

  return 0;
}

The value of the expression first < second is: 1
The value of the expression first == second is: 0