Variables Multiplication for the factorial calculation
The main problem is that you never initialize result (to 1), so this:
result=$(($result * $input))is equivalent to this:
result=$(( * $input))which is not a valid arithmetic expression.
The main problem is that you never initialize result (to 1), so this:
result=$(($result * $input))is equivalent to this:
result=$(( * $input))which is not a valid arithmetic expression.