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IP-18.c

Problem Statement

Write a C program that includes a user-defined function named findLargest with the signature int findLargest(int arr[], int size);. The function should take an array of integers and its size, and return the largest element in the array.

Metadata

Property Detail
Author Amit Dutta amitdutta4255@gmail.com
Date 03 Jan 2026
License MIT License (See the LICENSE file for details)
Difficulty Beginner (index: 3 / 10)

Concepts

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  • Recursion
  • Array
  • Sorting (possible)
  • Iteration

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Source Code

#include <stdio.h>

void inputArray(int[], int);
int findLargest(int[], int);

int main()
{
    int size;
    printf("How many element do you want to enter: ");
    scanf("%d", &size);
    int arr[size];
    inputArray(arr, size);
    printf("\nLargest Element is: %d", findLargest(arr, size));
    return 0;
}

void inputArray(int arr[], int size)
{
    int i;
    for (i = 0; i < size; i++)
    {
        printf("Enter element %d: ", i + 1);
        scanf("%d", &arr[i]);
    }
}

int findLargest(int arr[], int size)
{
    int largest = arr[0], i;
    for (i = 1; i < size; i++)
    {
        if (largest < arr[i])
        {
            largest = arr[i];
        }
    }
    return largest;
}

Explanation

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Copy the prompt below and paste it into any AI assistant.

    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 (IP-18.c):

    #include <stdio.h>

    void inputArray(int[], int);
    int findLargest(int[], int);

    int main()
    {
        int size;
        printf("How many element do you want to enter: ");
        scanf("%d", &size);
        int arr[size];
        inputArray(arr, size);
        printf("\nLargest Element is: %d", findLargest(arr, size));
        return 0;
    }

    void inputArray(int arr[], int size)
    {
        int i;
        for (i = 0; i < size; i++)
        {
            printf("Enter element %d: ", i + 1);
            scanf("%d", &arr[i]);
        }
    }

    int findLargest(int arr[], int size)
    {
        int largest = arr[0], i;
        for (i = 1; i < size; i++)
        {
            if (largest < arr[i])
            {
                largest = arr[i];
            }
        }
        return largest;
    }