Re^4: single quotes not allowing in perl

[vasanthgk91]

why use hyphen symbol very beginning..really i don't know that's why i ask u

[hdb]

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.

[tobyink]

Hyphen is used to match ranges like A-Z and 0-9. But sometimes you want to really match hyphen. In this case there are some fairly convoluted and difficult to remember rules specifying when hyphen means hyphen. An easy rule of thumb though is that if the hyphen is at the very beginning or very end of the range, it means hyphen.

[vasanthgk91]

thank u i understood why we put a hyphen symbol very beginning matching

[Anonymous Monk]

You had used a long word "beginning" (instead of, say, "start"), yet you continue to use "u" instead of "you". Oh, find some punctuation signs & use them appropriately while there.