qfedu-linux-advanced-level/day1/d29.sh

#!/bin/bash

function isZs()
{
    declare -i n
    n=$1
    for(( i=2; i<n; i++ )); do
        if (( n%i == 0 )); then
            return 1
        fi
    done
    return 0
}

isZs $1
if [[ $? -eq 0 ]] ; then
    echo "$1 是素数"
fi