how to change size of image with css code example

Example 1: css change image width

/*Search Term: "CSS change image width"*/

img {
  width: /*Add width here*/;
}

/*Example*/
img {
  width: 200px;
}

Example 2: Scaling Images and Videos css

.container {
  width: 50%;
  height: 200px;
  overflow: hidden;
}

.container img {
  max-width: 100%;
  height: auto;
  display: block;
}