Question

# Check whether a number is Kaprekar number without using string.(A Kaprekar number is a number whose square when divided into two parts and such that sum of parts is equal to the original number and none of the parts has value 0.)

```				```
ENTER A NUMBER: 45
45 IS A KAPREKAR NUMBER
45*45 = 2025 and 20 + 25 is 45

ENTER A NUMBER:99
99 is a kaprekar number
```
```

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Code

```				```
import java.util.Scanner;
public class kaprekarNumber
{
public static void main()
{
int num=0;
long count=0,sq=0,sum=0,firstPart=0,secondPart=0,temp=0;
Scanner sc=new Scanner(System.in);
System.out.print("ENTER A NUMBER:");
num=sc.nextInt();
if(num>0)
{
count=0;
sq=num*num;
temp=sq;
while(temp>0)
{
count++;
temp=temp/10;
}
temp=sq;
firstPart=temp% (long)Math.pow(10,count-count/2);
secondPart=temp/(long)Math.pow(10,count-count/2);
sum=firstPart+secondPart;
if((sum==num &&(firstPart!=0)&&(secondPart!=0))||num==1)
{
System.out.print(num+" is a kaprekar number");
}
else
{
System.out.print(num+" is not a kaprekar number");
}
}
}
}

```
```

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