center a div horizontally and vertically css code example

Example 1: css flex center horizontally and vertically

display: flex;
align-items: center;
justify-content: center;

Example 2: center div horizontally and vertically

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

Example 3: centering horizontally

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