How will I control the width and height of block made using <div>

Question

give codes

Answer 1

/*css*/
div {
width:123px; height:123px;
}

Answer 2

You are talking about position OR alignment ?

Answer 3

ty

Answer 4

thanks Eksnsh, can u tell how will I control the position of paragraph inside div
<div style="background-color:grey;"><p>this is a para</p></div>

Answer 5

i m talking about position, I mean the position of a para inside a div, that whether it is at the bottom inside the div element, or at the top inside the div element or at middle of the div element?