how to center align the html element in css examples

Code Example 1

#inner {
  width: 50%;
  margin: 0 auto;
}

Code Example 2

# center text
.center {
  text-align: center;
  
border: 3px solid green;
}

Code Example 3

#inner {
  width: 50%;
  margin: 0 auto;
}

# center text
.center {
  text-align: center;
  
border: 3px solid green;
}

Code Example 4

.parent {
  position: relative;
}
.child {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

Code Example 5

div.center{display:block;margin:auto;width:50%;}
p.center{text-align:center;}