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Problem2 #21

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4433b3a
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lifepupil Apr 7, 2015
0baaef3
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lifepupil Apr 7, 2015
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2 changes: 1 addition & 1 deletion index.html
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Original file line number Diff line number Diff line change
Expand Up @@ -7,6 +7,6 @@
<script src='main.js'></script>
</head>
<body>
<h1>javascript basics</h1>
<h1>javascript basics - problem 2</h1>
</body>
</html>
29 changes: 29 additions & 0 deletions main.js
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Expand Up @@ -22,3 +22,32 @@
// console.log('The result of a', o, 'b is', result);

// problem 2 : feature

var raw = prompt("Give me three numbers separated by ':'");
// var raw = "5:6:7"
var numstr = raw.split(':');
var numarr = numstr.map(function(num) {
return parseFloat(num);
});

var sum = 0;
var product = 1;
var avg = 0;
var variance = 0;
var stdev = 0;

for (var i = 0; i<numarr.length; i++) {
sum += numarr[i];
product *= numarr[i];
}


var n = numarr.length;
avg = sum/n;

for (var i = 0; i<numarr.length ; i++) {
variance += Math.pow((numarr[i]-avg),2);
}
stdev =Math.sqrt(variance/n);

console.log("sum",sum,"product",product,"avg",avg,"standard deviation",stdev);