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  <title>Average — N reads</title>
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  <h1>Average of N numbers</h1>
  <p>Edit <code>n</code> and <code>inputs</code> in the script, then click <strong>Run</strong>.</p>
  <pre id=out></pre>
  <script>!function(){var e=[1,2,3,4,5],t="The average of the entered numbers is: "+function(e,t){if(e<=0)return 0;for(var n=0,r=0;r<e;r++){var u=t(r);if(!Number.isFinite(u))return 0;n+=u}return n/e}(5,(function(t){return e[t]})).toFixed(6);document.getElementById("out").textContent=t}()</script>
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JavaScript Average — N indexed reads (Try It)