Regex: ONly Allow Upper case AND specific numbers

Question

I'm trying to create regex and test in javascript.

RULE: The text should only be 8 characters. Only contain Upper case and numbers 1-5 No lower case or special characters or 6-7 numbers.

example:

12345678 -- false a2345678 -- false aabbccdd -- false AABB33DD -- true // contains BOTH uppercase and numbers between 1-5 and nothing else AABB88DD -- false AABBCCDD -- false AABB3.DD -- false

CODE:

 var pattern = new RegExp("^(?=.*[1-5])(?=.*[A-Z]).+$"); pattern.test(code)

I'm not able to crate the right regex. Can anyone please help?

@ASDFGerte This isn't working. it accepts all Uppercase text like AAAAAAAA — TheDeveloper
– TheDeveloper, Commented Mar 15, 2022 at 21:29
Yes, i interpreted it that way - from your comment, i assume you want at least one letter and at least one number, but don't really see that reflected in your question. If you want at least one, just add a lookahead checking for one somewhere. — ASDFGerte
– ASDFGerte, Commented Mar 15, 2022 at 21:32
@SalmanA Should only accept the combination of uppercase and numbers between 1-5. — TheDeveloper
– TheDeveloper, Commented Mar 15, 2022 at 22:11

Ryszard Czech · Accepted Answer · 2022-03-15 21:32:20Z

Use

^(?=.*[1-5])(?=.*[A-Z])[A-Z1-5]{8}$

See regex proof.

EXPLANATION

-------------------------------------------------------------------------------- ^ the beginning of the string -------------------------------------------------------------------------------- (?= look ahead to see if there is: -------------------------------------------------------------------------------- .* any character except \n (0 or more times (matching the most amount possible)) -------------------------------------------------------------------------------- [1-5] any character of: '1' to '5' -------------------------------------------------------------------------------- ) end of look-ahead -------------------------------------------------------------------------------- (?= look ahead to see if there is: -------------------------------------------------------------------------------- .* any character except \n (0 or more times (matching the most amount possible)) -------------------------------------------------------------------------------- [A-Z] any character of: 'A' to 'Z' -------------------------------------------------------------------------------- ) end of look-ahead -------------------------------------------------------------------------------- [A-Z1-5]{8} any character of: 'A' to 'Z', '1' to '5' (8 times) -------------------------------------------------------------------------------- $ before an optional \n, and the end of the string

Collectives™ on Stack Overflow

Regex: ONly Allow Upper case AND specific numbers

1 Answer 1

Comments

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Related