how to find the average value of a function code example

Example 1: how to use a function to find the average in python

avreage_cost = cost
    avg = sum(avreage)/len(avreage) 
    print("The average amout you spent is ", round(avg,2))

Example 2: java function that returns the index of the largest value in an array

public int getIndexOfLargest( int[] array )
{
  if ( array == null || array.length == 0 ) return -1; // null or empty

  int largest = 0;
  for ( int i = 1; i < array.length; i++ )
  {
      if ( array[i] > array[largest] ) largest = i;
  }
  return largest; // position of the first largest found
}