Sunny Number in JAVA2 min read

In this tutorial, we will learn about Sunny numbers and create a Java program to check for sunny numbers. We will see two java examples on Sunny Number.

What is Sunny Number?

A number N is said to be a sunny number if the number next to the given number (N+1) is a perfect square.

Example: Let us take a Number 8, then the next number is 8+1=9 and as 3 is a square root of 9, hence 8 is a sunny Number.

Another example, let the number be 5, then 5+1=6, that has no square roots, hence 5 is not a sunny Number.

Java Program to Check Whether the Number is Sunny Number or Not.

The program uses Math.sqrt() function that is an inbuilt function in Java.


Enter the number: 80
80 is a Sunny number

//Another Execution
Enter the number: 6
6 is not a Sunny number

Java Program to find all the Sunny Number between a given Range


Enter the lower range: 1
Enter the upper range: 100
The Sunny number between 1 and 100 are:
3 8 15 24 35 48 63 80 99

Hope this article on the java program for the sunny number was helpful.


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