Java Relational Operators

We frequently make decisions based on specific parameters in our day-to-day lives, and similarly, we make programming decisions by comparing variables or values. This is done using a set of operators called Relational Operators. Let's take a look at Relational Operators.

Relational Operators

Relational Operators are used to compare values. It returns true or false as the result of a comparison. Below are the different relational operators

Operator

Name

>

Is greater than

<

Is less than

==

Is equal to

<=

Is less than or equal to

>=

Is greater than or equal to

!=

Is not equal to

The Relational Operators in Java work similar to that in Python.

Example

class Main {

    public static void main(String[] args) {

        System.out.println(5 < 10);

        System.out.println(2 < 1);

    }

}

 

Output

True

False

The expressions that result in either true or false are known as Logical Expressions. We will now look into comparing various data types in Java.

1. Comparing Numbers

Example

class Main {

    public static void main(String[] args) {

        System.out.println(2 <= 3);

        System.out.println(2.53f >= 2.55f);

    }

}

 

Output

true

false

 

2. Comparing Integers and Floats

Example

class Main {

    public static void main(String[] args) {

        System.out.println(12 == 12.0f);

        System.out.println(12 == 12.1f);

    }

}

 

Output

true

false

3. Comparing Strings

Example

class Main {

    public static void main(String[] args) {

        System.out.println("ABC" == "ABC");

        System.out.println("CBA" != "ABC");

    }

}

 

Output

true

true

Java is case-sensitive, meaning that X (capital letter) and x (small letter) are not the same.

Example

class Main {

    public static void main(String[] args) {

        System.out.println("ABC" == "abc");

    }

}

 

Output

false

 

4. Comparable Types

Comparisons using relational operators can also be made between different data types.

Example 1:

class Main {

    public static void main(String[] args) {

 

        System.out.println(5 > 4.567f);

        System.out.println(6.89f < 7L);

   }

}

 

Output

true

true

Likewise, we can compare any combination of int, float, and long.

 

Example 2:

class Main {

    public static void main(String[] args) {

        System.out.println('A' == 65);

        System.out.println('A' <= 64);

    }

}

 

Output

true

false

The char can also be compared in combination with int, float, or long. The comparison takes place based on the Unicode values. In the above example, number 65 of Unicode represents character A. Hence, the output for 'A' == 65 is true and 'A' <= 64 is false

Conclusion

  • Relational operators return  true or false as the result of a comparison.

  • Any combination of  int, float and long can be compared among themselves.

Java is case-sensitive. The  char can be compared with any combination of int, float, or long. The comparison takes place based on the Unicode values

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