Checking if an Integer Exists in a Range with Java

How to Check Whether an Integer Exists in a Range with Java

Java provides a number of ways to check whether an integer exists within a specified range. These methods can be used to determine if the requested number is within a given range or not. In this article, we’ll discuss how to properly check if an integer exists in a range with Java.

Using Between Operator

The most straightforward way to check if an integer exists in a range is by using the SQL between operator. The "between" operator is used to filter values that are within a specified range. All you need to do is provide the lower and upper bounds of the range as well as the value you wish to check, like so:

SELECT * 
FROM table 
WHERE value BETWEEN lower_bound AND upper_bound

For example, to check if the number 2 exists between 0 and 10, you can use the following query:

SELECT * 
FROM table 
WHERE value BETWEEN 0 AND 10

This will return all records where the value is between 0 and 10, which would include the number 2.

Using Math Library Methods

Another way to check if an integer exists in a range is to use the Math library methods min() and max(). These methods will return the lower and upper bounds of a range respectively. Using these methods, you can compare the value you wish to check against the range and determine if it exists:

int number = 4;
int lowerBound = 0;
int upperBound = 10;

if(number >= Math.min(lowerBound, upperBound) && number <= Math.max(lowerBound,upperBound)) {
    System.out.println("Number exists in the range!");
} else {
    System.out.println("Number does not exist in the range!");
}

This code will first compare the number "4" with the lower bound of 0. If it is greater than or equal to 0, the comparison will then be made with the upper bound of 10. If the number is less than or equal to 10, then it will exist in the range and the appropriate message will be displayed.

Conclusion

In this article, we looked at different ways to check if an integer exists in a range with Java. We discussed how to use the SQL between operator as well as how to use the Math library methods to compare the value with the lower and upper bounds of the range. With these techniques, you can easily check if a number exists within a given range.