正则表达式允许字符串、字符串后跟数字和连字符

Question

I wanna regex which will allow the following samples

1) abcd
2) abcd123
3) abcd-123

which should not allow

1) 123abcd
2) 123
3) 123-123

Answer 1

You can use this regex:

/^[a-z]+-?\d*$/i

RegEx Breakup:

• ^ - Assert start
• [az]+ - Match 1 or more alphabets
• -? - Match an optional hyphen
• \\d* - Match 0 or more digits
• $ - Assert end

Answer 2

我认为，如果小写

[a-z]-?\d