how to make a square have curved angels in css code example

Example 1: css rounded corners

/* Set rounded corners with border-radius property */

.class {
  border-radius: 4px;
}

.circle {
  border-radius: 50%;
}

Example 2: css rounded corners

/* Use border-radius property */

.class {
  border-radius: 5px;
}

.circle {
  border-radius: 50%;
}