JSFiddle - React, Tailwind, and code Playground
HTML
<p id="avg1"></p>
<p id="avg2"></p>JavaScript
function averageNumbers( a, b, c ) {
var sum = a + b + c;
var result = sum/3.0;
return result;
}
document.getElementById( "avg1" ).innerHTML = "Average 1,2,3 is" + averageNumbers( 1, 2, 3 );
document.getElementById( "avg2" ).innerHTML = "Average 6 4 5 is" + averageNumbers( 6, 4, 5 );