If the hyphen is in the middle of a character class, it defines a range. /[a-z]/ matches any lower case character. In the same way /[ -.]/ defines the range of ASCII characters between " " and "." and these are:  !"#$%&'()*+,-.. If the hyphen is at the start of the class, it will be taken as a hyphen and not to define a range.

In reply to Re^5: single quotes not allowing in perl by hdb
in thread single quotes not allowing in perl by vasanthgk91

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