CSS change image height

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

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

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

div {
  height: 
200px;
  width: 50%;
  background-color: powderblue;
} 

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

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

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

img {
  width: width;
  height: height;
}