C

function that returns the average of a given array of numbers

const average = arr => {
  const sum = arr.reduce((acc, num) => acc + num, 0)
  return sum / arr.length
}

program to find the average of n numbers using arrays.

// Program to find the average of n numbers using arrays

#include <stdio.h>
int main() {

  int marks[10], i, n, sum = 0, average;

  printf("Enter number of elements: ");
  scanf("%d", &n);

  for(i=0; i < n; ++i) {
    printf("Enter number%d: ",i+1);
    scanf("%d", &marks[i]);
          
    // adding integers entered by the user to the sum variable
    sum += marks[i];
  }

  average = sum / n;
  printf("Average = %d", average);

  return 0;
}