C++ Program to Find Largest Element of an Array

Largest Element of an Array

This program takes n number of element from user(where, n is specified by user) and stores data in an array. Then, this program displays the largest element of that array using loops.

Example: Program to Calculate Average of Numbers Using Arrays.

#include <iostream>
using namespace std;
int main()
{
    int i, n;
    float arr[100];

    cout << "Enter total number of elements(1 to 100): ";
    cin >> n;
    cout << endl;

    // Store number entered by the user
    for(i = 0; i < n; ++i){
       cout << "Enter Number " << i + 1 << " : ";
       cin >> arr[i];
    }

    // Loop to store largest number to arr[0]
    for(i = 1;i < n; ++i)
    {
       // Change < to > if you want to find the smallest element
       if(arr[0] < arr[i])
           arr[0] = arr[i];
    }
    cout << "Largest element = " << arr[0];

    return 0;
}

Output

Enter total number of elements: 5

Enter Number 1: 23
Enter Number 2: -16.5
Enter Number 3: 50
Enter Number 4: 3.5
Enter Number 5: 52

Largest element = 52

Working

This program takes n number of elements from user and stores it in array arr[]. To find the largest element, the first two elements of array are checked and largest of these two element is placed in arr[0]. Then, the first and third elements are checked and largest of these two element is placed in arr[0].

This process continues until and first and last elements are checked. Every time a number is entered by the user, its value is added to the sum variable. By the end of the loop, the total sum of all the numbers is stored in sum. After storing all the numbers, average is calculated and displayed.

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In the next Example, we will learn about C++ Calculate Standard Deviation.