[SOLVED] Bash script to find factorial

Issue

The program takes input but show the following errors, how to resolve those errors ?

Solution

I think you need to add a space after [ and before ]:

#!/bin/bash

echo "Enter the number to find it's factorial"
read number
total=1
counter=1
while [ $counter -le $number ];
do
    total=` expr $counter \* $total`
    counter=` expr $counter + 1`
done
echo $total

Working here on Ubuntu:

$ ./factorial.sh 
Enter the number to find it's factorial
5
120

Answered By - Jardel Lucca