`luc060.c`¶

Problem Statement

For the following set of sample data, compute the standard deviation and the mean.\nData: -6, -12, 8, 13, 11, 6, 7, 2, -6, -9, -10, 11, 10, 9, 2

Metadata¶

Property	Detail
Author	Amit Dutta amitdutta4255@gmail.com
Date	08 Feb 2026
License	MIT License (See the LICENSE file for details)
Difficulty	Beginner (index: 0 / 10)

Concepts¶

Beta Feature

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Array
Sorting (possible)
Iteration

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Source Code¶

#include <stdio.h>
#include <math.h>
#include <stdlib.h>

int main()
{
    int data[] = {-6, -12, 8, 13, 11, 6, 7, 2, -6, -9, -10, 11, 10, 9, 2};
    int n = 15, i;
    double sum = 0.0, mean, std_dev = 0.0;

    // Calculate Mean
    for (i = 0; i < n; i++)
    {
        sum += data[i];
    }
    mean = sum / n;

    // Calculate Standard Deviation
    for (i = 0; i < n; i++)
    {
        std_dev += pow(data[i] - mean, 2);
    }
    std_dev = sqrt(std_dev / n);

    printf("Count: %d\n", n);
    printf("Mean: %.2f\n", mean);
    printf("Standard Deviation: %.2f\n", std_dev);

    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 (luc060.c):

    #include <stdio.h>
    #include <math.h>
    #include <stdlib.h>

    int main()
    {
        int data[] = {-6, -12, 8, 13, 11, 6, 7, 2, -6, -9, -10, 11, 10, 9, 2};
        int n = 15, i;
        double sum = 0.0, mean, std_dev = 0.0;

        // Calculate Mean
        for (i = 0; i < n; i++)
        {
            sum += data[i];
        }
        mean = sum / n;

        // Calculate Standard Deviation
        for (i = 0; i < n; i++)
        {
            std_dev += pow(data[i] - mean, 2);
        }
        std_dev = sqrt(std_dev / n);

        printf("Count: %d\n", n);
        printf("Mean: %.2f\n", mean);
        printf("Standard Deviation: %.2f\n", std_dev);

        return 0;
    }

luc060.c¶