TechNumber.java

import java.util.Scanner;  
public class TechNumber
{  
public static void main(String args[])  
{  
int n, num, firstHalf, secondHalf, digits = 0, squareOfSum = 0;  
Scanner sc = new Scanner(System.in);  
System.out.print("Enter a number to check: ");  

n = sc.nextInt();  

num = n;  

while (num > 0)  
{  
    
digits++;  
 
num = num / 10;  
}  
 
if (digits % 2 == 0)  
{  
num = n;  

firstHalf = num % (int) Math.pow(10, digits / 2);  

secondHalf = num / (int) Math.pow(10, digits / 2);  

squareOfSum = (firstHalf + secondHalf) * (firstHalf + secondHalf);  
  
if (n == squareOfSum)  
{  
System.out.println(n+" is a tech number.");  
}  
else  
{  
System.out.println(n+" is not a tech number.");  
}  
}  
else  
{  
System.out.println(n+ " is not a tech number.");  
}  
}  
}