Question

Write a program that prompts for a phone number of 10 digits and two dashes, with dashes after the
area code and the next three numbers. For example, 017-555-1212 is a legal input.
Display if the phone number entered is valid format or not and display if the phone number is valid or
not (i.e., contains just the digits and dash at specific places.​

Answer 1

Explanation:

The Code for the program stated in question statement is as follows;

CODE

num = input(‘Input your Phone Number : ‘)

value = False   ## length must be 12

if len(num) == 12 and num[3] == ‘-‘ and num[7] == ‘-‘:

    if (num[:3]+num[4:7]+num[8:]).isdigit():  ## checking that all the characters         are digits excluding the dashes

    value = True

if value = True:

   print(num, ‘is valid’)

else:

   print(num, ‘is invalid’)

Answer 2

Answer:

this is the best answer , pls mark me as brainliest