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C++ Comparison Operators

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  • Last Updated : 27 Nov, 2022
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Comparison operators are operators used for comparing two elements, these are mostly used with if-else conditions as they return true-false as result.

There are mainly 6 Comparison Operators namely:

  1. Greater than (>)  :  this operator checks whether operand1 is greater than operand2. If the result turns out to be true, it returns true or else returns false. example 5>3 ->returns true
  2. Greater than or equal to (>=)  :  this operator checks whether operand1 is greater than or equal to operand2. If the result turns out to be true, it returns true or else returns false. example 5>=5 ->returns true
  3. Less than (<)  :  this operator checks whether operand1 is lesser than operand2. If the result turns out to be true, it returns true or else returns false. example 3<5 ->returns true
  4. Less than or equal to (< =)  :  this operator checks whether operand1 is lesser than or equal to operand2. If the result turns out to be true, it returns true or else returns false. example 5<=5 ->returns true
  5. Equal to (==)  :  this operator checks whether operand1 is equal to operand2. If the result turns out to be true, it returns true or else returns false. example 5==5 ->returns true
  6. Not Equal to (! =)  :  this operator checks whether operand1 is not equal to operand2. If the result turns out to be true, it returns true or else returns false. example 5!=3 ->returns true

Comparison Operators have only two return values, either true (1) or False (0).

Example Code to cover all 6 Comparison Operators: 

C++




// C++ Program to implement
// comparison operators
#include <iostream>
  
using namespace std;
  
int main()
{
  
    int a, b;
    a = 5, b = 3;
    // example to demonstrate '>' operator
    if (a > b)
        cout << "a is greater than b" << endl;
    else
        cout << "a is not greater than b" << endl;
  
    a = 5, b = 5;
    // example to demonstrate '>=' operator
    if (a >= b)
        cout << "a is greater than or equal to b" << endl;
    else
        cout << "a is not greater than or equal b" << endl;
  
    a = 2, b = 3;
    // example to demonstrate '<' operator
    if (a < b)
        cout << "a is lesser than b" << endl;
    else
        cout << "a is not lesser than b" << endl;
  
    a = 2, b = 3;
    // example to demonstrate '<' operator
    if (a <= b)
        cout << "a is lesser than or equal to b" << endl;
    else
        cout << "a is not lesser than or equal to b"
             << endl;
  
    a = 5, b = 5;
    // example to demonstrate '==' operator
    if (a == b)
        cout << "a is equal to b" << endl;
    else
        cout << "a is not equal to b" << endl;
  
    a = 5, b = 3;
    // example to demonstrate '!=' operator
    if (a != b)
        cout << "a is not equal to b" << endl;
    else
        cout << "a is equal to b" << endl;
  
    return 0;
}


Output

a is greater than b
a is greater than or equal to b
a is lesser than b
a is lesser than or equal to b
a is equal to b
a is not equal to b

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