id and class in css not working while am programming ?

Question

i am codeing in note pad only ..
should i use any other softwares to develop a website using css and html

Answer 1

remember that you cant use multiple times the same id

#test{/* this is an id selector*/}
.test{/* this is a class selector */}

Answer 2

yes
but classes can use multiple times right..?

Answer 3

you try notepad++