Excluding some character from a range - javascript regular expression

Question

To validate only word simplest regex would be (I think)

/^\\w+$/

I want to exclude digits and _ from this (as it accept

Answer 1

To exclude k or p from [a-zA-Z] you need to use a negative lookahead assertion.

(?![kpKP])[a-zA-Z]+

Use anchors if necessary.

^(?:(?![kpKP])[a-zA-Z])+$

It checks for not of k or p before matching each character.

OR

^(?!.*[kpKP])[a-zA-Z]+$

It just excludes the lines which contains k or p and matches only those lines which contains only alphabets other than k or p.

DEMO