how to find second largest number in array code example

Example 1: find second largest number in array javascript

var secondMax = function (){ 
    var arr = [20, 120, 111, 215, 54, 78]; // use int arrays
    var max = Math.max.apply(null, arr); // get the max of the array
    arr.splice(arr.indexOf(max), 1); // remove max from the array
    return Math.max.apply(null, arr); // get the 2nd max
};

Example 2: second largest value in array java 8

public class ThirdLargestNumberInAnArray {
   public static void main(String args[]){
      int temp, size;
      int array[] = {10, 20, 25, 63, 96, 57};
      size = array.length;

      for(int i = 0; i<size; i++ ){
         for(int j = i+1; j<size; j++){

            if(array[i]>array[j]){
               temp = array[i];
               array[i] = array[j];
               array[j] = temp;
            }
         }
      }
      System.out.println("Third second largest number is:: "+array[size-2]);
   }
}

Example 3: find second largest number in array javascript

var secondMax = function (arr){ 
    var max = Math.max.apply(null, arr), // get the max of the array
        maxi = arr.indexOf(max);
    arr[maxi] = -Infinity; // replace max in the array with -infinity
    var secondMax = Math.max.apply(null, arr); // get the new max 
    arr[maxi] = max;
    return secondMax;
};

Example 4: find second max element in array in 1 iteration

/**
 * C program to find second largest number in an array
 */

#include <stdio.h>
#include <limits.h> // For INT_MIN

#define MAX_SIZE 1000     // Maximum array size 

int main()
{
    int arr[MAX_SIZE], size, i;
    int max1, max2;

    /* Input size of the array */
    printf("Enter size of the array (1-1000): ");
    scanf("%d", &size);

    /* Input array elements */ 
    printf("Enter elements in the array: ");
    for(i=0; i<size; i++)
    {
        scanf("%d", &arr[i]);
    }

    max1 = max2 = INT_MIN;


    /*
     * Check for first largest and second
     */
    for(i=0; i<size; i++)
    {
        if(arr[i] > max1)
        {
            /*
             * If current element of the array is first largest
             * then make current max as second max
             * and then max as current array element
             */
            max2 = max1;
            max1 = arr[i];
        }
        else if(arr[i] > max2 && arr[i] < max1)
        {
            /*
             * If current array element is less than first largest
             * but is greater than second largest then make it
             * second largest
             */
            max2 = arr[i];
        }
    }

    printf("First largest = %d\n", max1);
    printf("Second largest = %d", max2);

    return 0;
}