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Module DEMO-32-59DEMO-C-32

Reverse 4-Digit Number using while

DEMO-C-32 • Programming in C

Browser-only practice

Problem Statement

Write a C program that asks the user to enter a 4-digit integer and then prints its digits in reverse order using a loop.

Requirements:

  • Use arithmetic operators / and %.
  • Implement a loop to reverse the digits.

Example:

Input: 1234 Output: Reversed number: 4321

Input Format

The program reads a single line from standard input containing a 4-digit positive integer.

Output Format

The program prints a single line in the format: Reversed number: <reversed_number>

Sample Testcases

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Sample #1
Public sample
Input
1234
Output
Reversed number: 4321
Explanation
Basic test case with sample input.
Sample #2
Public sample
Input
5678
Output
Reversed number: 8765
Explanation
Hidden test case for same logic path.
Sample #3
Public sample
Input
1023
Output
Reversed number: 3201
Explanation
Test with mixed digits including zero.
Sample #4
Public sample
Input
4056
Output
Reversed number: 6504
Explanation
Another test with mixed digits including zero.

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