`P043.c`¶

Problem Statement

Write a program to check palindrome number.

Metadata¶

Property	Detail
Author	Amit Dutta (amitdutta4255@gmail.com)
License	MIT
Difficulty	Beginner (index: 1 / 10)

Concepts¶

Beta Feature

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Recursion
Pointers
Iteration

Actions¶

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Source Code¶

#include <stdio.h>
int main()
{
    int num, temp, rev;
    printf("Enter the number : ");
    scanf("%d", &num);
    temp = num;
    rev = 0;
    while (temp > 0)
    {
        rev = (rev * 10) + (temp % 10);
        temp /= 10;
    }
    if (num == rev)
    {
        printf("%d is a palindrome number.", num);
    }
    else
    {
        printf("%d is not a palindrome number.", num);
    }
    return 0;
}

Explanation¶

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    You are explaining a C programming code to a beginner.

    STRICT RULES:

    - Only use the given code. Do NOT assume anything not present.

    - Do NOT add extra examples.

    - Keep explanation clear and short.

    - If something is unclear, say "Not clear from code".

    - Follow the exact format below. Do NOT change headings.

    FORMAT:

    [START]

    ## What it does

    (Explain the overall purpose in 1-2 sentences)

    ## Step-by-step

    (Explain how the code works in steps, simple language)

    ## Key Concepts

    (List concepts like loop, condition, function, etc.)

    ## Notes

    (Mention any limitations, errors, or assumptions)

    [END]

    CODE (P043.c):

    #include <stdio.h>
    int main()
    {
        int num, temp, rev;
        printf("Enter the number : ");
        scanf("%d", &num);
        temp = num;
        rev = 0;
        while (temp > 0)
        {
            rev = (rev * 10) + (temp % 10);
            temp /= 10;
        }
        if (num == rev)
        {
            printf("%d is a palindrome number.", num);
        }
        else
        {
            printf("%d is not a palindrome number.", num);
        }
        return 0;
    }

P043.c¶