$total = 0;

foreach ($products as $product) {

    $subtotal = $product['price']*$product['quantity'];

    $total += $subtotal;

}

​

echo $total;

const arr = [1,2,3,4,5]

const sum = arr.reduce((a,b) => a+b)

const num = [1, 3, 1, 1] 

const reducer = (accumulator, currentValue) => accumulator + currentValue;

const sum = num.reduce(reducer);

console.log(sum)

// (1+3+1+1) = 6

const sum = [1, 2, 3].reduce((partialSum, a) => partialSum + a, 0);

console.log(sum); // 6

 Run code snippet

const sum = (...args) => args.reduce((a, b) => a + b, 0);

console.log(sum(1,2,3)); // returns 6

$a = array(5,15,25);

echo array_sum($a);

int sum = Arrays.stream("1 2 3 4".split("\\s+")).mapToInt(Integer::parseInt).sum();

​

/**

 * C program to find sum of all elements of array

 */

​

#include <stdio.h>

#define MAX_SIZE 100

​

int main()

{

    int arr[MAX_SIZE];

    int i, n, sum=0;

​

    /* Input size of the array */

    printf("Enter size of the array: ");

    scanf("%d", &n);

​

    /* Input elements in array */

    printf("Enter %d elements in the array: ", n);

    for(i=0; i<n; i++)

    {

        scanf("%d", &arr[i]);

​

        // Add each array element to sum

        sum += arr[i];

    }

​

    printf("Sum of all elements of array = %d", sum);

​

    return 0;

}

/**

 * C program to find sum of all elements of array 

 */

​

#include <stdio.h>

#define MAX_SIZE 100

​

int main()

{

    int arr[MAX_SIZE];

    int i, n, sum=0;

​

    /* Input size of the array */

    printf("Enter size of the array: ");

    scanf("%d", &n);

​

    /* Input elements in array */

    printf("Enter %d elements in the array: ", n);

    for(i=0; i<n; i++)

    {

        scanf("%d", &arr[i]);

    }

​

    /*

     * Add each array element to sum

     */

    for(i=0; i<n; i++)

    {

        sum = sum + arr[i];

    }

​

​

    printf("Sum of all elements of array = %d", sum);

​

    return 0;

}

import java.util.Scanner;

class SumOfArray{

      public static void main(String[] args){

      Scanner in = new Scanner(System.in);

      System.out.println("Enter the size of array ::: ");

      int n = in.nextInt();

      int[] arr = new int[n];

      System.out.print("Enter the elements in the array ::: ");

      for( int i = 0; i < n; i++){

      arr[i] = in.nextInt();

      }

      int sum = 0;

      for( int i = 0; i < n; i++){

      sum = sum + arr[i];

      }

      System.out.println("The sum of elements of array ::: "+sum);

      }

​

}