'I want to use this shell script and change it to using command line argument [duplicate]

using ubuntu terminal so it could be with command-lins arg. thank you.

echo "enter number"
read num
function prime
{
for((i=2; i<=num/2; i++))
do
  if [ $((num%i)) -eq 0 ]
  then
    echo "$num is not a prime number."
    exit
  fi
done
echo "$num is a prime number."
}
r=`prime $number`
echo "$r"
linuxubuntu


Solution 1:[1]

2nd line can look like this

num=$1

function should be define first before other code

Sources

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Source: Stack Overflow

Solution Source
Solution 1

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