Hello Programmers, In this post, you will know how to solve the** Validating phone number in Python HackerRank Solution**. This problem is a part of the **HackerRank Python Programming** Series.

One more thing to add, donâ€™t directly look for the solutions, first try to solve the problems of Hackerrank by yourself. If you find any difficulty after trying several times, then you can look for solutions.

## Validating phone number in Python HackerRank Solution

### Problem

Let’s dive into the interesting topic of regular expressions! You are given some input, and you are required to check whether they are valid mobile numbers.

A valid mobile number is a ten digit number starting with a 7, 8 or 9.**Concept :**A valid mobile number is a ten digit number starting with a 7, 8 or 9.

Regular expressions are a key concept in any programming language. A quick explanation with Python examples is available here. You could also go through the link below to read more about regular expressions in Python.

https://developers.google.com/edu/python/regular-expressions

#### Input Format :

The first line contains an integer N, the number of inputs.

N lines follow, each containing some string.

#### Constraints :

- 1 <= N <= 10
- 2 <= len(number) <= 15

#### Output Format :

For every string listed, print “YES” if it is a valid mobile number and “NO” if it is not on separate lines. Do not print the quotes.

#### Sample Input :

295874562811252478965

#### Sample Output :

YES NO

### Validating phone number in Python HackerRank Solutions

import re N = int(input()) for i in range(N): number = input() if(len(number)==10 and number.isdigit()): output = re.findall(r"^[789]\d{9}$",number) if(len(output)==1): print("YES") else: print("NO") else: print("NO")

**Disclaimer: **The above Problem **(Validating phone number in Python)** is generated by **Hackerrank** but the Solution is Provided by **BrokenProgrammers**. This tutorial is only for Educational and Learning purposes.

**Next: **Validating and Parsing Email Addresses in Python HackerRank Solution