Average of odd numbers till a given odd number | Function to calculate the average of odd numbers ; count odd numbers ; store the sum of odd numbers ; driver function
function averageOdd ( n ) { if ( n % 2 == 0 ) { document . write ( " " ) ; return - 1 ; } let sum = 0 , count = 0 ; while ( n >= 1 ) { count ++ ; sum += n ; n = n - 2 ; } return sum / count ; } let n = 15 ; document . write ( averageOdd ( n ) ) ;