Newbie Question about 'Style' Names

[gener672]

I've been using CSS for a while now but am now worried that I'm not 'naming' things (classes/id's) correctly.

What is the difference between:

p.class1 and .class1 .... when defined in a style sheet?

OR

p#id1 and #id1 .... when defined in a style sheet?

In the 'class' example above .... when I define p.class1 does it mean I can only use class="class1" in a <p> tag? (ie <p class="class1"> ... instaed of something like <div class="class1" )

Same question for #id1.

(sorry if duplicate question ...did a search but after first 5 pages of results got tired - and frustrated)

[Banfa]

In the 'class' example above .... when I define p.class1 does it mean I can only use class="class1" in a <p> tag? (ie <p class="class1"> ... instaed of something like <div class="class1" )

Basically yes.

p.class1 {
color: red;
}

<p class="class1">
</p>

<div class="class1">
</div>

only the text in the p will be red.

same for ids

[gener672]

TY for the quick answer. LEARNING