Problem #27

Solution Source Code

Code Overview

1. Header Files and Namespace:

  • <iostream> is included for input and output operations.
  • <string> is included for potential future use (not used in this program).
  • using namespace std; allows the use of standard functions without prefixing them with std::.

2. User Input Function (ReadNumber)

  • Prompts the user to enter a number (N).
  • Reads and returns the number as an integer.

3. Range Printing Using While Loop (PrintRangeFromNto1_UsingWhile)

  • Uses a while loop to print numbers from N to 1.
  • Initializes Counter = N + 1, then decrements it in each iteration.

4. Range Printing Using Do-While Loop (PrintRangeFromNto1_UsingDoWhile)

  • Uses a do-while loop to print numbers from N to 1.
  • Ensures at least one iteration before checking the condition.

5. Range Printing Using For Loop (PrintRangeFromNto1_UsingFor)

  • Uses a for loop to print numbers from N to 1.
  • Initializes, checks, and decrements the loop variable in a single statement.

6. Program Execution (main())

  • Calls ReadNumber() to get user input.
  • Calls PrintRangeFromNto1_UsingWhile(), PrintRangeFromNto1_UsingDoWhile(), and PrintRangeFromNto1_UsingFor() to print ranges using different loops.
  • Returns 0 to indicate successful execution.

This structured explanation ensures clarity and ease of understanding. 

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