Shell Script to find factorial of a number - The Coding Shala

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Shell Script to find factorial of a number

Write a shell script program to find the factorial value of the given input number?

Code: 

#!/bin/bash
factorial()
{
ans=$1
if((ans<=2)); then
echo $ans
else
f=$((ans-1))
f=$(factorial $f)
f=$((f*ans))
echo $f
fi
}
read -p "enter number" n
if((n==0)); then
echo "1"
else
factorial $n
fi



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