C++ Relational Operators
Last Updated :
31 Jul, 2023
In C++ programming language, we sometimes require to compare values and expressions. This comparison allows us to determine relationships, make decisions, and control the flow of our programs. The relational operators in C++ provide the means to compare values and evaluate conditions.
In this article, we will learn about C++ relational operators and understand their significance in making logical comparisons in code.
Relational Operators in C++
C++ Relational operators are used to compare two values or expressions, and based on this comparison, it returns a boolean value (either true or false) as the result. Generally false is represented as 0 and true is represented as any non-zero value (mostly 1).
How to use Relational Operator?
All C++ relational operators are binary operators that are used with two operands as shown:
operand1 relational_operator operand2
expression1 relational_operator expression2
Types of C++ Relational Operators
We have six relational operators in C++ which are explained below with examples.
>
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Greater than
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<
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Less than
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>=
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Greater than equal to
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<=
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Less than equal to
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==
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Equal to
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!=
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Not equal to
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1. Greater than ( > )
The greater than ( > ) operator checks if the left operand is greater than the right operand. It returns true if the condition is met and false otherwise.
Example:
29 > 21 // returns true
12 > 12 // return false
10 > 57 // return false
2. Less than ( < )
The less than ( < ) operator checks if the left operand is less than the right operand. It returns true if the condition is met and false otherwise.
Example:
2 < 21 // returns true
12 < 12 // return false
12 < 5 // return false
3. Greater than or equal to ( >= )
The greater than or equal to ( >= ) operator checks if the left operand is greater than or equal to the right operand. It returns true if the condition is met and false otherwise.
Example:
29 >= 21 // returns true
12 >= 12 // return true
10 >= 58 // return false
4. Less than or equal to ( <= )
The less than or equal to ( <= ) operator checks if the left operand is less than or equal to the right operand. It returns true if the condition is met and false otherwise.
Example:
2 <= 21 // returns true
12 <= 12 // return true
12 <= 5 // return false
5. Equal to ( == )
The equal to ( == ) operator checks if two values are equal. It returns true if the values are equal and false otherwise.
Example:
9 == 9 // returns true
19 == 12 // return false
6. Not equal to ( != )
The not equal to ( != ) operator checks if two values are not equal. It returns true if the values are different and false if they are equal.
Example:
12 != 21 // returns true
12 != 12 // return false
Example of C++ Relational Operators
In the below code, we have defined two variables with some integer value and we have printed the output by comparing them using relational operators in C++. In the output, we get 1, 0, 0, 0, and 1 where 0 means false and 1 means true.
C++
#include <iostream>
using namespace std;
int main()
{
int a = 10;
int b = 6;
cout << "a > b = " << (a > b) << endl;
cout << "a < b = " << (a < b) << endl;
cout << "a == b = " << (a == b) << endl;
cout << "a != b = " << (a != b) << endl;
return 0;
}
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Output
a > b = 1
a < b = 0
a == b = 0
a != b = 1
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