how to select first child in css code example

Example 1: css first child

:first-child {
	//styles here
}

:nth-child(1) { //the benefit of this is you can do it for 2nd, 3rd etc...
	//styles here 
}

Example 2: css first child

/*CSS First - forth child*/
:first-child {}

:nth-child(2){}
:nth-child(3){}
:nth-child(4){}

Example 3: select first 5 child css

li:nth-child(-n+5) {
    color: green;   
}

Example 4: select first child in element css

p:first-child
 { 

   background-color: yellow;

 }