may not contain sequential characters e.g. 123 abc

#May not contain sequential characters e.g. 123 abc how to#

Given string str, the task is to check whether the given string contains 3 or more consecutive identical characters/numbers or not by using Regular Expression.

#May not contain sequential characters e.g. 123 abc how to#

How to check if a string contains 3 or more identical characters? Inside the Validate JavaScript function, the value of the TextBox is tested against the Regular Expression Alphabets and Numbers (AlphaNumeric) characters with Space. Regular Expression (Regex) to exclude (not allow) Special Characters in JavaScript When the Button is clicked, the Validate JavaScript function is called. How to use regex to exclude special characters? 3 or more consecutive identical characters/numbers ex – 111, aaa, bbb. Can a regular expression match 3 consecutive numbers?ģ or more consecutive sequential characters/numbers ex – 123, abc, 789, pqr etc. Do you have any suggestion/solution for that? Note: Those strings don’t contain any three identical consecutive characters. Is there a regex for a string with No 3 consecutive characters?įor binary string with no three consecutive 0, it’s quite a simple regex (1|01|001)*| (0|00| ϵ) but I found its very difficult for a normal alphabet string. Tip: Use the global title attribute to describe the pattern to help the user.

Note: The pattern attribute works with the following input types: text, date, search, url, tel, email, and password. The pattern attribute specifies a regular expression that the element’s value is checked against on form submission.