Regex pattern to match at least 1 number and 1 character in a string

Question

I have a regex          a-zA-Z0-9        this just allows only alphanumerics but also if I insert only number s  or only character s  then also it accepts it  I want it to work like the field should accept only alphanumeric values but the value must contain at least both 1 character and 1 number

User · Answer

I can see that other responders have given you a complete solution. Problem with regexes is that they can be difficult to maintain/understand.

An easier solution would be to retain your existing regex, then create two new regexes to test for your "at least one alphabetic" and "at least one numeric".

So, test for this :-

/^([a-zA-Z0-9]+)$/

Then this :-

/\d/

Then this :-

/[A-Z]/i

If your string passes all three regexes, you have the answer you need.

User · Answer

If you need the digit to be at the end of any word  this worked for me      b  a-zA-Z   0-9    b g     b word boundary   a-zA-Z  any letter   0-9  any number     unlimited search  show all results

User · Answer

Why not first apply the whole test  and then add individual tests for characters and numbers  Anyway  if you want to do it all in one regexp  use positive lookahead           0-9        a-zA-Z    a-zA-Z0-9

User · Answer

This solution accepts at least 1 number and at least 1 character      w d     0-9     A-Za-z       A-Za-z      0-9

User · Answer

And an idea with a negative check         d    a-z     a-z d    i         at start look ahead if string does not  d   contain only digits   or  a-z    contain only letters  a-z d    matches one or more letters or digits until   end    Have a look at this regex101 demo   the i flag turns on caseless matching   a-z matches a-zA-Z

User · Answer

This RE will do         0-9   a-z   a-z   0-9   a-z0-9    i   Explanation of RE    Match either of the following   At least one number  then one letter or At least one letter  then one number plus  Any remaining numbers and letters         creates an unreferenced group  i is the ignore-case flag  so that a-z    a-zA-Z

User · Answer

While the accepted answer is correct  I find this regex a lot easier to read   REGEX      A-Za-z   0-9   0-9   A-Za-z   A-Za-z0-9

User · Answer

The accepted answers is not worked as it is not allow to enter special characters   Its worked perfect for me          0-9        a-zA-Z      S     6 20     one digit must one character must  lower or upper  every other things optional   Thank you

User · Answer

Maybe a bit late  but this is my RE       w   d  a-zA-Z   a-zA-Z   d  w       Explanation    w  -  0 or more alphanumeric digits  at the beginning   d  a-zA-Z   a-zA-Z   d -  a digit   a letter OR a letter   a digit   w  -  0 or more alphanumeric digits  again  I hope it was understandable

[javascript] Regex pattern to match at least 1 number and 1 character in a string

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