are height: auto and height: 100% different in html code example

Example 1: css height auto vs 100

<div style="height:50px">
    <div id="innerDiv" style="height:auto">
          <div id="evenInner" style="height:10px">
          </div>
    </div>
</div>

Example 2: css height auto vs 100

<div style="height:50px">
    <div id="innerDiv" style="height:100%">
    </div>
</div>