Linux bash script to find Average of prime numbers in range

This post in reponse to a comment on the post " Linux script to find prime numbers in a range of numbers " The request was to find the average of all the prime numbers found in the given range.

#! /bin/bash low=1 count=0 sum=0 while [ $low -eq 1 ] do echo "Enter the lower limit,greater than 1" read low done echo "Enter the upper limit" read upper for mun in `seq $low $upper` do ret=$(factor $mun | grep $mun | cut -d ":" -f 2 | cut -d " " -f 2) if [ "$ret" -eq "$mun" ] then echo "$mun is prime" ((count++)) sum=$((sum+mun)) fi done average=$((sum/count)) echo -e "\n There are $count number of prime numbers" echo "The sum of the prime numbers is $sum" echo "The average of the prime numbers is $average"

Save the file say as average_prime_range.sh Execute it using bash.

$bash average_prime_range.sh

Following is a sample output