📅  最后修改于: 2022-03-11 14:49:55.699000             🧑  作者: Mango
#!/bin/bash
echo "Enter a phone number as XXXXXXXX: "
read phoneNumber
pat="^[0-9]{8}$"
while [[ ! $phoneNumber =~ $pat ]]
do
echo "Please enter a phone number as XXXXXXXX: "
read phoneNumber
done
echo $phoneNumber