Design And Code A C# Console Program That Prompts Users For

Design and code a C# console program that prompts users for ten numbers, ranging between 10 and 100

Develop a C# console application that interacts with the user by requesting ten numeric inputs within the range of 10 to 100. The program must compare each new number entered with the previous number to detect duplicates. If a duplicate is entered, the program should prompt the user to input a different number, displaying the number until it is unique within the sequence. The program continues this process until ten valid, non-duplicate numbers are collected, then displays all the entered numbers.

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In the realm of programming, especially within introductory courses such as Fundamentals of Programming and Logic, creating interactive console applications serves as a foundational exercise for understanding control structures, input validation, and data management. This project focuses on designing a C# program that prompts users to enter ten numbers within a specified range, ensuring no duplicates of consecutive inputs and handling invalid entries appropriately.

The core objective of this application is to develop a robust input validation mechanism that not only checks whether the user’s input falls within the acceptable range but also compares each new entry to the previous number to prevent immediate duplicates. This ensures the sequence of numbers entered remains unique relative to the last input, which is a critical aspect of data integrity in programming.

To implement this, the program employs a loop structure—specifically, a while loop—that continues to prompt the user until ten valid, non-duplicate numbers are recorded. The logic inside the loop involves reading user input, parsing it to an integer, verifying the range, and checking for duplicates against the last entered number. If the input fails any validation, the program displays an appropriate message and prompts the user to try again without advancing the counter of entries.

Throughout this development process, pseudocode and algorithm planning play significant roles. The initial plan involves guiding the user with prompts such as "Enter a number between 10 and 100." The program then processes the input; if it’s outside the range or a duplicate of the previous number, it asks for a new input and displays relevant messages like "Invalid number entered; let’s try again!" or "Duplicate detected, please enter a different number." Once all ten numbers are successfully entered, the program outputs the list of numbers for verification.

From a software engineering perspective, designing a clean and maintainable solution involves separating concerns: first, handling user input and validation, then storing the numbers in a collection (e.g., an array or list), and finally, presenting the results. This separation enhances readability and future scalability of the code.

The implementation in C# involves utilizing console input/output methods, conditionals, and loops. Error handling for input parsing is essential to prevent runtime exceptions, especially when dealing with user inputs that may not be numeric. Employing try-catch blocks or input validation functions ensures the program’s robustness.

Furthermore, testing is a crucial phase. Testing the program with various inputs—valid numbers, numbers out of range, non-numeric inputs, and duplicates—guards against logical errors and enhances reliability. Capturing screenshots of the working program demonstrates its functionality and aids in assessment.

In conclusion, this programming exercise illustrates fundamental concepts in input validation, loop control, and conditional logic within C#. It reinforces the importance of user interaction, data validation, and the application of pseudo-code and algorithm design as preparatory steps before coding. Successful completion of this project provides a practical understanding of basic programming constructs, error handling, and data integrity—skills essential for more advanced software development tasks.

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