193. Valid Phone Numbers



https://leetcode.com/problems/valid-phone-numbers/description/

For example, assume that file.txt has the following content:

987-123-4567
123 456 7890
[phone]
(001) 345-00001

Your script should output the following valid phone numbers:

987-123-4567
[phone]

#!/bin/bash

reg1="^[0-9]{3}-[0-9]{3}-[0-9]{4}$"
reg2="^\([0-9]{3}\) [0-9]{3}-[0-9]{4}$"
filename="file.txt"
while read line
do
        if [[ $line =~ $reg1 ]] || [[ $line =~ $reg2 ]]
        then
                echo $line
        fi

done < $filename