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How to Validate a Mobile Phone Number Using Kotlin

Greetings, today we shall be validating a phone number using kotlin. In this tutorial we look at how to validate mobile phone numbers.

The idea for this tutorial is to be able to replicate this from memory in a coding exam, so we won't be using a regex pattern for this.

We can validate a mobile phone number in kotlin by checking if each digit of the input is a digit or not. However, since we are dealing with a mobile phone number and want this to work for any country, we have also added a check to see if the first character of the input is a “+”.

We also check the length of the phone number to ensure it is the correct size. This can be adjusted to meet the specific needs of your kotlin program.

You can expand upon this kotlin mobile phone number validation tutorial if you want a specific country by checking for specific calling codes. Eg: +44 for the UK or +91 for India.

Thanks for watching this kotlin tutorial on how to validate a mobile phone number.

This kotlin tutorial is aimed at beginners.

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How to Validate a Mobile Phone Number Using Kotlin