how to make a border radius code example

Example 1: border radius css

/* Radius is set for all 4 sides */
border-radius: 10px;

/* top-left-and-bottom-right | top-right-and-bottom-left */
border-radius: 10px 5%;

/* top-left | top-right-and-bottom-left | bottom-right */
border-radius: 2px 4px 2px;

/* top-left | top-right | bottom-right | bottom-left */
border-radius: 1px 0 3px 4px;

/* The syntax of the second radius allows one to four values */
/* first radius / radius */
border-radius: 10px / 20px;
/* first radius => corner point to left or right side*/
/* second radius => corner point to top or bottom side*/
/* radius => corner point to both sides*/

Example 2: how to round the corners of a div outline in css

div {
  outline: auto;
  outline-style: round;
}

Example 3: css border radius

-webkit-border-radius: 5px;
-moz-border-radius: 5px;
border-radius: 5px;