Tech Number Example
Let's take a look at a few more examples of Tech Numbers:
Example 1
Consider the number 3025.
Split 3025 into two parts: "a" = 30 and "b" = 25
Add the parts: 30 + 25 = 55
Square the sum: 55^2 = 3025
Since the square of the sum equals the original number, 3025 is a Tech Number.
Example 2
Let's check if 4512 is a Tech Number.
Split 4512 into two parts: "a" = 45 and "b" = 12
Add the parts: 45 + 12 = 57
Square the sum: 57^2 = 3249
The square of the sum does not equal the original number, so 4512 is not a Tech Number.
Example 3
Verify whether 8100 is a Tech Number.
Split 8100 into two parts: "a" = 81 and "b" = 00
Add the parts: 81 + 00 = 81
Square the sum: 81^2 = 6561
The square of the sum does not equal the original number, so 8100 is not a Tech Number.
In these examples, we can see that not all numbers are Tech Numbers. Only those numbers that satisfy the condition (a + b)^2 = n, where "n" is the original number and "a" and "b" are the split parts, are considered Tech Numbers.
Steps to Find Tech Number
Now, let’s understand how can we find the tech number:
Step 1: Take the input number "n" from the user.
Step 2: Calculate the total number of digits in the number "n". You can do this by converting the number to a string and finding its length or by using a loop to count the digits.
Step 3: If the number of digits is odd, the number cannot be a Tech Number. In this case, you can stop and conclude that the number is not a Tech Number.
Step 4: If the number of digits is even, proceed to the next step.
Step 5: Split the number "n" into two equal parts "a" & "b". You can achieve this by dividing the number of digits by 2 and using appropriate mathematical operations to extract the parts.
Step 6: Calculate the sum of the parts "a" & "b".
Step 7: Square the sum obtained in step 6.
Step 8: Compare the square of the sum with the original number "n".
Step 9: If the square of the sum equals the original number "n", then "n" is a Tech Number. Otherwise, "n" is not a Tech Number.
Note: With these steps, you can determine whether a given number is a Tech Number or not. The main thing is to split the number into two equal parts, calculate the sum of the parts, square the sum, & compare it with the original number.
Tech Number Java Program
Now, let's write a Java program to check if a given number is a Tech Number or not:
import java.util.Scanner;
public class TechNumber {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
System.out.print("Enter a number: ");
int number = scanner.nextInt();
if (isTechNumber(number)) {
System.out.println(number + " is a Tech Number.");
} else {
System.out.println(number + " is not a Tech Number.");
}
}
public static boolean isTechNumber(int number) {
int digits = String.valueOf(number).length();
if (digits % 2 != 0) {
return false;
}
int halfDigits = digits / 2;
int firstHalf = number / (int) Math.pow(10, halfDigits);
int secondHalf = number % (int) Math.pow(10, halfDigits);
int sum = firstHalf + secondHalf;
int square = sum * sum;
return square == number;
}
}

You can also try this code with Online Java Compiler
Run Code
In this example :
1. We import the `Scanner` class to take input from the user.
2. In the `main` method, we create a `Scanner` object and prompt the user to enter a number.
3. We call the `isTechNumber` method, passing the input number as an argument. This method will return `true` if the number is a Tech Number and `false` otherwise.
4. Inside the `isTechNumber` method, we first calculate the number of digits in the number using `String.valueOf(number).length()`.
5. If the number of digits is odd, we return `false` since a Tech Number must have an even number of digits.
6. We calculate `halfDigits` by dividing the total number of digits by 2.
7. We split the number into two equal parts: `firstHalf` and `secondHalf`. We use `Math.pow(10, halfDigits)` to divide the number appropriately.
8. We calculate the sum of `firstHalf` and `secondHalf`.
9. We square the sum and store it in the `square` variable.
10. Finally, we compare `square` with the original `number`. If they are equal, we return `true`, indicating that the number is a Tech Number. Otherwise, we return `false`.
When you run this program and enter a number, it will output whether the number is a Tech Number or not.
For example, if you enter 2025, the output will be:
Enter a number: 2025
2025 is a Tech Number.
And if you enter 4512, the output will be:
Enter a number: 4512
4512 is not a Tech Number.
This Java program provides a simple and efficient way to check if a given number is a Tech Number based on the steps we discussed earlier.
Frequently Asked Questions
Can a negative number be a Tech Number?
No, a Tech Number is always a positive integer.
Is zero a Tech Number?
No, zero is not a Tech Number because it does not satisfy the Tech Number property.
Can a Tech Number have an odd number of digits?
No, a Tech Number must have an even number of digits.
Conclusion
In this article, we discussed the concept of Tech Numbers in Java. We learned that a Tech Number is a special number that can be split into two equal parts, and the square of the sum of those parts equals the original number. We looked at examples to understand the properties of Tech Numbers and developed a step-by-step approach to find them. Finally, we implemented a Java program to check if a given number is a Tech Number.
You can also check out our other blogs on Code360.