Compute the Average – HackerRank Solution

In this post, we will solve Compute the Average HackerRank Solution. This problem (Compute the Average) is a part of Linux Shell series.

Task

Given N integers, compute their average, rounded to three decimal places.

Input Format

The first line contains an integer, N.
Each of the following N lines contains a single integer.

Output Format

Display the average of the N integers, rounded off to three decimal places.

Input Constraints

• 1 <= N <= 500
• -10000 <= x <= 10000 (x refers to elements of the list of integers for which the average is to be computed)

Sample Input

4
1
2
9
8

Sample Output

5.000

Explanation

The ‘4’ in the first line indicates that there are four integers whose average is to be computed.
The average = (1 + 2 + 9 + 8)/4 = 20/4 = 5.000 (correct to three decimal places).
Please include the zeroes even if they are redundant (e.g. 0.000 instead of 0).

Solution – Compute the Average – HackerRank Solution

#!/bin/bash
#Easier way is to do using for loop
read num
ctr=$num
sum=0
while [ $ctr -gt 0 ]
do
   read x
   sum=$((sum + x))
   ctr=$((ctr - 1))     
done
printf "%.3f\n" `echo "$sum/$num" | bc -l`

Note: This problem (Compute the Average) is generated by HackerRank but the solution is provided by CodingBroz. This tutorial is only for Educational and Learning purpose.