Would it go wrong of I didn't use hash ??

Question

css

Answer 1

Dunno
Maybe Rule will be unselect your element?

Answer 2

@Sami Khan:

Not only for normal/simple CSS, because without hashtag (#) or dot (.) prefixed to the name identifier, it will be interpreted as a tag name rather than an id or class name identifier ^^

Answer 3

"#" for id and "." for classes.. yes it is necessary in css..
i don't know about other preprocessors but for the simple CSS it is mandatory

Answer 4

thanx @visph ;)