Well firstly it has to be a numerical value, can include the following numbers 0123456789 and the plus symbol. +. But what about the following conditions, where do you get this data? -It has to be in the format [country dial code + area code + phone number] -It has to be a min and max length. Almost all UK phone numbers, including the dialling code, are 11 digits long. There are about 40 area codes with 10 digits. What is the length of a mobile number? The total length of all phone numbers (area code and the phone number) is constant at 10 digits. For example, the number 7513200000 signifies the area code 751 (the area code for In laravel the size validation on a field that's numeric will indicate the max integer it cannot be larger than. Use digits_between: 'national-id' => 'required|digits_between:10,10|numeric'. Share. Improve this answer. Approach 1: Using JavaScript Regular Expression in React JS. Implement a regular expression for input length to validate the mobile number input. This regular expresstion will return false if the input length is more than 10 digits and true if length is valid. Example: This example implemets a form with mobile number input field validated using Xiaomi Mi Max 3 (2018) Screen size: 6.9-inches. Dimensions: 176.2 x 87.4 x 8mm. Weight: 221g. Five years on from the Galaxy Mega and Xperia Z Ultra and smartphone screens were only getting bigger

To get max value you actually have to calculate the sum of 2^n with n from 0 to 31 or simpler 2^32 - 1 and you'll get '4294967295' as max for unsigned int, one less than anticipated. Now do the same with 2^31 - 1 for signed int and you'll get 2,147,483,647.

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max phone number length in world