Question 4 - Long Answer Type Questions (5 Marks each) - Chapter 8 Class 11 - Strings

Write a program that prompts for a phone number of 10 digits and two dashes after the area code and the next three digits of the number. (eg. 017-230-0037). Display if the phone number entered is in valid format or not and also of the phone number is valid or not.

Answer:

Code:

phone_no=input( "Enter phone number: " )

flag= 0

for i in range(len(phone_no)):

    if i==3 or i==7:

 if phone_no[i]!= '-' :

            print( "Invalid phone number" )

            flag= -1

            break

    else:

        if phone_no[i].isalpha():

            print( "Invalid phone number" )

            flag= -1

            break

if flag== 0 :

    print("Valid phone number")