Example:
18 is a NIVEN number
1+8 = 9
18%9 = = 0
Let's start the code of determining if a number is NIVEN or not.
Below is the code for determining if a number is NIVEN.
import java.util.Scanner;
class SUPERSPY
{
public static void main(String[]args)
{
Scanner sc = new Scanner(System.in);
System.out.println("Enter a number");
int n = sc.nextInt();
int sum = 0,temp = n;
while(temp!=0)
{
sum+=temp%10;
temp/=10;
}
if(n%sum == 0)
{
System.out.println("It is a NIVEN number");
}
else
{
System.out.println("It is not a NIVEN number");
}
}
}
Demonstration:
1. First, Scanner class is imported.
2. A class namely NIVEN have been defined.
3. A main method have been defined.
4. Object of Scanner class have been created.
5. A Number has been demanded from user by giving a message.
6. To accept and store the number, a variable namely n has been defined of int data type
7. Then, two different variables namely
a) sum - This variable will store the sum of digits. First, it is initialized with 0.
b) temp - This variable will hold the number given by user on temporary basis. Actually, entire operation will be done with temp variable. temp = n means the value stored in n namely variable is getting assigned to temp. It means that throughout the entire operation, original value stored in n namely variable will remain safe.
Now, let us see the working:
while(temp!=0)
This loop will continue its iteration until value of temp doesn't become equals to 0. Say for example, user gave 18. Here, first 8 will be extracted and at last, 1 will get extracted as it is in index 0. Refer to the below diagram for clear understanding.
sum+ = temp%10;
Here, we need to understand few things.
First, individual digits from given number is getting extracted using temp%10.
As in case of 18, the first extracted number using temp%10 will be 8.
Then, this number will get added to the variable sum.
At last, second number using temp%10 will be 1 and it will also be added to sum.
Now, sum is containing 8+1 = 9
temp/=10;
In previous operation, we have seen that the first extracted number using temp%10 was 8. Immediately, after this operation, temp/=10; will be executed which means 18 is now going to be divided by 10 resulting to 1.8. This operation will permanently delete this 8 from temp variable. so that in next iteration, 8 doesn't gets added to the sum variable again. Like this, it will keep on deleting the digits from temp variable.
Here is the final outcome:
sum is now containing sum of digits i.e. 1+8 = 9
n is containing 18
Finally, with the conditional statement using if-else, it is determined if n mod(%) sum is equal to 0 or not as it can be seen in the program. If n mod(%) sum is equal to 0, then it is displaying that the number is a NIVEN number. Otherwise, it is displaying that the number is not a NIVEN number.
Now, write this program and test it with various numbers and increase your knowledge.
Happy Coding.......
