html5examples/HTML5 - Beginners - UnlimitedArgumentsFunction.html at master · Pakz001/html5examples · GitHub

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<!DOCTYPE html>
<html>
<head>
  <meta charsetp="UTF-8">
  <meta name="viewport" content="width=device-width" />
</head>
<body bgcolor="black">
<style>#myCanvas {touch-action: none;}</style>
<canvas id="myCanvas" width="320" height="240" style="border:0px solid #d3d3d3;">
Use different browser.
</canvas>
  <script>
    var c=document.getElementById("myCanvas");
    var ctx=c.getContext("2d");


gameloop=setInterval(doGameLoop,16);

function doGameLoop(){
myCanvas.height = window.innerHeight*.98;
myCanvas.width = window.innerWidth*.96;
ctx.fillStyle="rgb(0,0,0)";
ctx.fillRect(0,0,c.width,c.height);
ctx.fillStyle="rgb(255,255,255)";
ctx.fillText("A javascript/html example.",10,10);

// create our variable and
// call the addDamage function
// with a series of damage values
var tdam = addDamage(5,10,15,20,43,13,54);

// draw total damage to the screen
ctx.fillText("total damage done : "+tdam,10,50);


}
// create a function that can
// take a unlimited series of
// arguments. add all values
// and return the total.
function addDamage(...damage){
	var totalDamage = 0;
	for(var i=0;i<damage.length;i++){
		totalDamage+=damage[i];
	}
	return totalDamage;
}
</script>
</body>
</html>