DataView getFloat64 Function in JavaScript

The getFloat64() function of the DataView gets and returns a signed 64-bit floating point number at the specified position.

Syntax

Its syntax is as follows

dataView.getFloat64();

Example

Try the following example.

 Live Demo

<html>
<head>
   <title>JavaScript Example</title>
</head>
<body>
   <script type="text/javascript">
      var arrayBuffer = new ArrayBuffer(20);
      var dataView = new DataView(arrayBuffer);
      dataView.setFloat64(1, 654.44);
      document.write(dataView.getFloat64(1));
   </script>
</body>
</html>

Output

654.44

Example

To this function, in addition to floating point values you can also pass Math functions.

 Live Demo

<html>
<head>
   <title>JavaScript Example</title>
</head>
<body>
   <script type="text/javascript">
      var arrayBuffer = new ArrayBuffer(20);
      var dataView = new DataView(arrayBuffer);
      dataView.setFloat64(1, Math.LOG2E);
      document.write(dataView.getFloat64(1));
   </script>
</body>
</html>

Output

1.4426950408889634

Example

If nothing is stored in the dataview and if you still, try to get data, this function will return NaN.

 Live Demo

<html>
<head>
   <title>JavaScript Example</title>
</head>
<body>
   <script type="text/javascript">
      var arrayBuffer = new ArrayBuffer(20);
      var dataView = new DataView(arrayBuffer);
      dataView.setFloat64(1);
      document.write(dataView.getFloat64(1));
   </script>
</body>
</html>

Output

NaN
Updated on: 2020-06-25T10:16:32+05:30

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