How to perform square root operation?

Question

I would like to calculate distance from origin for some points. I don't know how to do that in Javascript.

If x and y are the co-ordinates of a point distanceFromOrigin=sqrt(x^2 + y^2).

So far, below is the code I could get running in HTML:

<html>
<head>
<script id="vertices">
float distanceFromOrigin;

void
main()
{
distanceFromOrigin=(x * x) +(y * y);


}
</script>
</head>
</html>

How to add a square root to the above variable distanceFromOrigin. And also is there a power function instead of doing x*x?

See [MDN](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/sqrt) on `Math.sqrt()`. — Patrick Hofman, Jul 18 '15 at 12:45
Sorry but this question has no research done, please do so before asking. Asking on SO should be more of a last resort. — Spencer Wieczorek, Jul 18 '15 at 12:46
Math.sqrt() doesn't work in HTML. Is there anything that I have to import? — srk, Jul 18 '15 at 12:53
No, I have two files. 1 html file and 1 java script file. I want to compute square root in html file — srk, Jul 18 '15 at 12:59

score 1 · Answer 1 · edited May 30 '16 at 14:01

1

Try this..

Check out this Fiddle

function calculate() {
  var x = document.getElementById("x").value;
  var y = document.getElementById("y").value;
  console.log("Distance from origin to x and y is : " + Math.round(Math.sqrt(Math.pow(x, 2) + Math.pow(y, 2))));
}

<div>
  <input type="text" id="x" placeholder="x">
  <input type="text" id="y" placeholder="y">
  <input type="button" value="Find distance from origin" onclick="calculate();">
</div>

edited May 30 '16 at 14:01

dippas

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answered Jul 18 '15 at 12:54

Malik Naik

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If you need the exact value then remove `Math.round()` – Malik Naik Jul 18 '15 at 12:58

score -2 · Answer 2 · edited Jul 18 '15 at 12:45

-2

Math.sqrt(9); // --> 3
Math.pow(4, 3); // --> 64

W3 Schools

edited Jul 18 '15 at 12:45

Patrick Hofman

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answered Jul 18 '15 at 12:44

SDekov

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I don't hope you are asking me. I don't know. Maybe because it lacks any explanation? – Patrick Hofman Jul 18 '15 at 12:57

How to perform square root operation?

2 Answers2