Magic number in java
/**
* Magic number are 10, 19
* If sum of all digits of the enter numberber become 1 then it is a Magic Number
* For example 19 We first add 1+9 = 10 and then 1 + 0 = 1.
* So here resultan value is 1 and it is a magic number.
*
* Inspire Skills
* Khurshid Md Anwar
*/
import java.util.*;
public class MagicNumbers
{
static Scanner sc=new Scanner(System.in);
static int number=0;
// Input Method, which a take a value
private void input()
{
System.out.print("Enter a Number to check Magic Number: ");
number = sc.nextInt();
}
// Check the number after adding its digits 1 or not
public boolean isMagicNumber(int n)
{
int sum=0,flag,d=0;
do
{
flag=0;
while(n%10==0)
n/=10;
while(n%10!=0 || n>0) //Addition of the digit
{
sum+=(n%10);
n/=10;
}
if(sum>=10)
{
n=sum;
sum=0;
}
else
flag=1;
}while(flag==0);
if(sum==1)
return true;
else
return false;
} // end of isMagicNumber method
// Main Method
public static void main(String args[])
{
boolean value;
MagicNumbers ob=new MagicNumbers();
ob.input();
value = ob.isMagicNumber(number);
if(value)
System.out.println(number + " is a Magic Number");
else
System.out.println(number + " is Not A Magic Number");
}
}
output:
Enter a Number to check Magic Number: 10
10 is a Magic Number
Enter a Number to check Magic Number: 12
12 is Not A Magic Number
