# Tech Number in Java

(Last Updated On: 12/10/2023)

In this blog, we’ll go into great detail about tech numbers, including what they are, how to recognize them in Java, and their practical uses. In order to help readers better understand the concept, we will also include examples and code samples.

## What is Tech Number in Java?

A tech number is a number where the product of its digits and the sum of its digits are the same. Another way to state it is that we consider a number as a tech number if the sum of its digits added to the product of its digits equals one. For instance, the number 24 is a technical number because the product of its digits (2*4=8) and the sum of its digits (2+4=6) equals six.

It is important to understand Java’s technical numbers in order to develop problem-solving abilities in programming. Technical numbers have practical uses in fields like digital signal processing and cryptography and can improve one’s comprehension of basic programming ideas like loops, conditional statements, and operators. Additionally, learning how to use tech numbers in Java can improve one’s comprehension of basic programming ideas.

## Characteristics of Tech Numbers in Java

Tech Numbers are unique numbers where adding their digits together equals adding them together. Their special property, which enables them to be represented as the product of two different prime numbers, makes them helpful in the field of cryptography. Other names for them include “Product-sum numbers” and “Product-difference numbers.”

### Examples of Tech Numbers in Java:

For a better understanding of Tech Numbers, consider the following examples:

4 is a Tech Number because 2*2=4 and 2+2=4

12 is a Tech Number because 2*6=12 and 2+6=8

19 is not a Tech Number because 1*9=9 and 1+9=10

20 is not a Tech Number because 2*0=0 and 2+0=2

27 is a Tech Number because 3*9=27 and 3+9=12

This example shows that, even though not every number possesses a special characteristic that sets it apart from other numbers, Tech Numbers are not all numbers.

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## Example code in Java to find Tech numbers using a while loop:

```public class Main {
public static void main(String[] args) {
//declaring the variables
int inputNum, temp, firstNum, secondNum, count = 0,res = 0;
//Declare and initialize the original input number
inputNum = 2025;
//store the original number into a temporary variable
temp = inputNum;
//find the number of digits available in input number
while (temp > 0) {
count++;
temp = temp / 10;
}
//check whether the number of digits is ever or not
//if even number of digits are present then proceed to check Tech number
//if the original number is equal to calculated value
System.out.println(inputNum+" is a Tech Number.");
} if (count % 2 == 0) {
temp = inputNum;
//find the first part and store it into a variable
firstNum = temp % (int) Math.pow(10, count / 2);
//find the second part and store it into a variable
secondNum = temp / (int) Math.pow(10, count / 2);
//calculate the square of sum of those two parts of input number
res = (int) Math.pow((firstNum + secondNum), 2);
if (inputNum == res) {

else {
//if the original number is not equal to calculated value
System.out.println(inputNum+" is not a Tech Number.");
}
}
else {
//if the input number has odd number of digits
System.out.println(inputNum+" is not a Tech Number.");
}
}
}```

Explanation of the code:

The code imports the Scanner class to read user input from the console.
It prompts the user to enter a number and stores it in the num variable.
The code initializes the sum variable to 0, and it will be used to calculate the sum of squares of digits.
Using a while loop, the code iterates until the num becomes 0. In each iteration:
The code extracts the last digit of num by utilizing the modulo operator (num % 10).
It adds the square of the digit to the sum.
The code removes the last digit from num by dividing it by 10 (num /= 10).
After the loop, the code checks the value of the sum :
If the sum is equal to 1, it indicates that the number is a Tech number.
It is clear that a number is not a Tech number if the total equals 4, but it leads to one instead.
If the sum is neither 1 nor 4, it indicates that the number is not a Tech number.
Finally, the code prints the result to the console based on the condition met.
The scanner.close() statement closes the Scanner object to free up system resources.

#### Output:

``2025 is a Tech Number.``

It’s a Tech number, by the way. The number 19, a Tech number, is what we entered in this example. The computer program has calculated the sum of squares of digits, which is not equal to 1 or 4. (1 + 9 2 = 82). “The number is not a Tech number,” the program has printed as a result.

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### How to Check if a Number is a Tech Number in Java?

A step-by-step explanation of the process to check if a number is a Tech Number in Java:

• Convert the given number into a string
• Calculate the length of the string
• Split the string into two parts based on the length of the string
• Convert each part into a number
• Calculate the sum of the two numbers
• Calculate the product of the two numbers
• Check if the sum of the two numbers is equal to the product of the two numbers
• If yes, the number is a Tech Number, else it is not a Tech Number

## Applications of Tech Numbers

Computer science, mathematics, and cryptography all make use of tech numbers in various ways. Notable examples of applications include :

computer science: tech numbers find application in creating distinctive identifiers such as user IDs, transaction IDs, and session IDs.Tech numbers aid in avoiding duplicate IDs because they are always unique.

Mathematics: In the study of number theory in mathematics, tech numbers are utilized to generate random numbers for statistical analysis and to investigate prime numbers.

Cryptography: The development of safe encryption algorithms in cryptography uses Tech numbers. Tech numbers aid in the creation of secure keys that are distinctive and unpredictable, making it challenging for attackers to break the encryption.

### Real-world examples of the application of Tech Numbers are:

• The e-commerce sector often employs tech numbers to generate unique transaction IDs and order IDs. These IDs assist in tracking customer orders and preventing order duplication.
• The online gaming industry utilizes tech numbers to generate personalized session IDs for players. These IDs aid in monitoring player progress and discouraging cheating.
• In the healthcare sector, tech numbers find application in generating unique patient IDs. These IDs assist in tracking patients’ medical histories and preventing the creation of duplicate records.

Tech numbers have important uses in a variety of industries, from computer science to cryptography. Their special qualities are helpful in developing secure encryption algorithms, random number generators, and unique identifiers.

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## Challenges and Tips with Tech Numbers in Java

### Common difficulties that people face while dealing with Tech Numbers:

1. Limited applicability: Since Tech Numbers are not commonly used in real-world settings, it is likely that few people have had significant experience utilizing them.
2. Complex to comprehend: Beginners and those with little programming experience may find the idea of Tech Numbers challenging to grasp.
3. Implementation challenge: Programmers who are unfamiliar with complex mathematical calculations may find it difficult to implement Tech Numbers.

### Tips to overcome these challenges:

1. Build a solid mathematical foundation: Working with Tech Numbers successfully requires an understanding of the mathematical principles that underlie them.
2. Practice your programming skills: Regular practice and experimentation with programming concepts will help you develop your abilities to work with Tech Numbers.
3. Use online resources: You can learn a lot about Tech Numbers and how to use them efficiently by using online resources like tutorials and discussion boards, which are widely available.
4. Collaborate with other programmers: Learning from the experiences of other programmers will help you understand Tech Numbers better.
5. Participate in workshops and training sessions: Attending workshops and training sessions can help you gain hands-on knowledge and experience using Tech Numbers.
6. Breaking down compound mathematical problems into smaller, more manageable steps can simplify their understanding and implementation.

These guidelines can help programmers successfully implement Tech Numbers in their applications while overcoming the difficulties that come with working with them.

In this article, we’ve covered what Tech numbers are and various methods for determining whether a given number is a Tech number. The discussion has covered four strategies: the modulo operator, bitwise operations, string manipulation, and regular expressions. The choice of the best strategy to use will depend on the needs and use case of the application. Tech numbers are an important concept in computer science and mathematics, and understanding them can help us understand binary numbers and digital logic.

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