Table of contents
1.
Introduction
2.
Tech Number
3.
Tech Number Example
3.1.
Example 1
3.2.
Example 2
3.3.
Example 3
4.
Steps to Find Tech Number
5.
Tech Number Java Program
6.
Frequently Asked Questions
6.1.
Can a negative number be a Tech Number?
6.2.
Is zero a Tech Number?
6.3.
Can a Tech Number have an odd number of digits?
7.
Conclusion
Last Updated: Nov 18, 2024
Easy

Tech Number in Java

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Introduction

In programming, developers come across many different concepts that help them solve complex problems. One such interesting concept is the Tech Number in Java. Tech numbers are special kinds of numbers with unique properties that make them different from regular numbers. It may be a lesser-known concept, but it plays a very important role in numeric studies. 

Tech Number in Java

In this article, we will learn what a Tech Number is, how to identify it, and write a Java program to check if a given number is a Tech Number or not.

Tech Number

A Tech Number is a special kind of number that has a unique property. To understand what makes a number a Tech Number, let's understand it down into simpler terms: 

Imagine you have a number, let's call it "n". If you can split this number "n" into two equal parts, let's name them "a" & "b", and the square of the sum of these parts (a + b)^2 equals the original number "n", then "n" is called a Tech Number.

In mathematical terms, if a number "n" can be expressed as:

n = (a * 10^(digits/2)) + b, where digits is the total number of digits in "n"
and (a + b)^2 = n
then "n" is a Tech Number.


For example, let's take the number 2025. We can split it into two parts: "a" = 20 and "b" = 25. Now, if we add these parts (20 + 25) and square the result, we get:

(20 + 25)^2 = 45^2 = 2025


Since the square of the sum of the parts equals the original number, 2025 is a Tech Number.

Note: Tech Numbers have this fascinating property where the square of the sum of their parts gives back the original number. This unique characteristic makes them interesting to study and work with in programming.

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.

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