ruby regular expression to see if only numbers

Question

I'd like to have a reqex that checks that every character is a number [0-9]+. I have tried:

'4th'=~/[\d]+/
'4th'=~/\d+/

but not working. How would I check for this?

thx

Answer 1

"12345" =~ /\A\d+\Z/

• \A = beginning of string (not line, string)
• \d+ = one or more digits
• \Z = end of string (not line, string)