how to move image to center in html code example

Example 1: center image with position absolute

.wrapper img {
  left: 50%;
  transform: translate(-50%,0);
  position: absolute;
  z-index: 1 
}

Example 2: css center image

.center {
  display: block;
  margin-left: auto;
  margin-right: auto;
}

Example 3: html center image

/* It's better practice to do this in CSS, not HTML. 
So here is the CSS code! */
img {
  display: block;
  margin-left: auto;
  margin-right: auto;
}