# Validating phone number in Python HackerRank Solution 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, don’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.

#### 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.

```2
9587456281
1252478965
```

```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"^\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.