I need regular Expression which should start with letters only and later it can contain numbers or letters.But starting should contain letters only. I have used
^[a-zA-Z]*[a-zA-Z0-9]+$
But it is not working. Can anyone please help me out?
You used the wrong cardinality. Use +
( at least one ) instead of *
( 0 or more ), as shown below:
^[a-zA-Z]+[a-zA-Z0-9]*$
The regex you are using is pretty good. The problem with this: ^[a-zA-Z]*[a-zA-Z0-9]+$
is that you are using the *
operator, which denotes 0 or more repetitions. If you want it to start with a letter, just use this: ^[a-zA-Z][a-zA-Z0-9]*$
. This will match a letter an any letters or numbers which might follow.
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.