[SOLVED] Shell script which finds the sum average and product of five numbers

Issue

This is what I have so far:

echo "Please enter your first number: "
read a
echo "Second number: "
read b

(etc..) That works fine, but when I tried to set a function for sum average and product, I ran into some problems.

This is what I tried:

sum= ($a + $b + $c + $d + $e)
avg= ($sum / 5) #The five was showing up in red text
prod= ($a * $b * $c * $d * $e)

echo "The sum of these numbers is: " $sum
echo "The average of these numbers is: " $avg
echo "The product of these numbers is: " $prod

but when I ran it (after I inputted the numbers 1,2,3,4,5) I got this back:

The sum of these numbers is: 1 + 2 + 3 + 4 + 5
The average of these numbers is:  1 + 2 + 3 + 4 + 5 / 5
The product of these numbers is: 1 * 2 * 3 * 4 * 5

So my question is how do I get these functions to compute within the ()

Any help is appreciated, thanks.

Solution

Try this:

#!/bin/bash

echo "Please enter your first number: "
read a
echo "Second number: "
read b
echo "Third number: "
read c
echo "Fourth number: "
read d
echo "Fifth number: "
read e

sum=$(($a + $b + $c + $d + $e))
avg=$(echo $sum / 5 | bc -l ) 
prod=$(($a * $b * $c * $d * $e))

echo "The sum of these numbers is: " $sum
echo "The average of these numbers is: " $avg
echo "The product of these numbers is: " $prod

The only issue is some minor syntax troubles in the sum,avg,prod part.

The average is not done the way the other calculations are because it may return a floating-point number. This number is piped to bc and stored in avg.

---

When I run this program, I get the results:

Please enter your first number: 
2
Second number: 
2
Third number: 
2
Fourth number: 
3
Fifth number: 
2
The sum of these numbers is:  11
The average of these numbers is:  2.20000000000000000000
The product of these numbers is:  48

Answered By - Blue Ice

Answer Checked By - Candace Johnson (WPSolving Volunteer)