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APC-PRAC-015.c

Problem Statement

Write a program to display all numbers between lb (lower bound) and up (upper bound) which ends with digit 7 or divisible by 7.

Metadata

Property Detail
Author Amit Dutta (amitdutta4255@gmail.com)
License MIT
Difficulty Beginner (index: 2 / 10)

Concepts

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  • Recursion
  • Sorting (possible)
  • Iteration

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Source Code

#include <stdio.h>

int main()
{
    int lb, ub, i;
    printf("Enter the lb, ub : ");
    scanf("%d %d", &lb, &ub);
    printf("\nEnds with 7 :");
    for (i = lb; i <= ub; i++)
    {
        if (i % 10 == 7)
        {
            printf("  %d", i);
        }
    }
    printf("\nDivisible by 7 :");
    for (i = lb; i <= ub; i++)
    {
        if (i % 7 == 0)
        {
            printf("  %d", i);
        }
    }
    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".

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    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 (APC-PRAC-015.c):

    #include <stdio.h>

    int main()
    {
        int lb, ub, i;
        printf("Enter the lb, ub : ");
        scanf("%d %d", &lb, &ub);
        printf("\nEnds with 7 :");
        for (i = lb; i <= ub; i++)
        {
            if (i % 10 == 7)
            {
                printf("  %d", i);
            }
        }
        printf("\nDivisible by 7 :");
        for (i = lb; i <= ub; i++)
        {
            if (i % 7 == 0)
            {
                printf("  %d", i);
            }
        }
        return 0;
    }