qfedu-linux-advanced-level/day1/d24.sh

#!/bin/bash

declare -i n
read -p "请输入一个整数: " n

for (( i=2; i<n; i++ )); do
    if (( n%i == 0)); then
        echo "$n 不是素数"
        exit 1
    fi
done
echo "$n 是素数"

echo "$n"