Relational operators are used to check the relationship between two operands and to compare two or more numbers or even expressions in cases. The return type of a relational operator is a Boolean that is, either True or False (1 or 0).

#include <iostream>
using namespace std;
 
int main()
{
    int a = 4, b = 5;
    cout << "The value of a == b is " << (a == b) << endl;
    cout << "The value of a < b is " << (a < b) << endl;
    cout << "The value of a > b is " << (a > b) << endl;
}

Output:

The value of a==b is 0
The value of a<b is 1
The value of a>b is 0

Logical Operators

To determine whether an expression is true or false, logical operators are utilised. The logical operators AND, OR, and NOT are the three. Although they are frequently used to compare expressions to determine whether they are satisfactory or not, they may be used to compare Boolean values as well.

• AND: it returns true when both operands are true or 1.
• OR: it returns true when either operand is true or 1.
• NOT: it is employed to change the operand’s logical state and is true when the operand is false.

#include <iostream>
using namespace std;
 
int main()
{
    int a = 1, b = 0;
    cout << "The value of a && b is " << (a && b) << endl;
    cout << "The value of a || b is " << (a || b) << endl;
    cout << "The value of !a is " << (!a) << endl;
}

Output:

The value of a && b is 0
The value of a || b is 1
The value of !a is 0

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