JavaScript DataView.getFloat64() Method
The dataView.getFloat64() is an inbuilt function in dataView which is used to get a 64-bit float at the specified location i.e, at byte offset from the start of the dataview. The range of 64-bit floating-point number is form -1.7E+308 to +1.7E+308
Syntax:
dataView.getFloat64(byteOffset)
Parameters: It has parameter byteOffset which is offset in a byte and it says from the start of the view were to read the data.
Return value: It returns 64-bit signed float number.
Below are examples of the DataView.getFloat64() Method.
Example 1: When a positive float number passed as a parameter
javascript
var buffer = new ArrayBuffer(20);
var dataview1 = new DataView(buffer, 0, 10);
dataview1.setFloat64(1, 12.01);
console.log(dataview1.getFloat64(1) + "<br>" );
|
Output:
12.01
Example 2:
javascript
var buffer = new ArrayBuffer(20);
var dataview1 = new DataView(buffer, 0, 10);
dataview1.setFloat64(1, 56.34);
console.log(dataview1.getFloat64(1));
|
Output:
56.34
Example 3: Not only float value but also a math function like Math.PI can be taken as the parameter of the function.
javascript
var buffer = new ArrayBuffer(20);
var dataview1 = new DataView(buffer, 0, 10);
dataview1.setFloat64(1, Math.PI);
console.log(dataview1.getFloat64(1));
|
Output:
3.1415927410125732
Example 4: When nothing as data is used to store then it returns NaN i.e, not a number.
javascript
var buffer = new ArrayBuffer(20);
var dataview1 = new DataView(buffer, 0, 10);
dataview1.setFloat64(1);
console.log(dataview1.getFloat64(1));
|
Output:
NaN
We have a complete list of Javascript Date Objects, to check those please go through this JavaScript dataView Complete Reference article.
Supported Browsers:
- Google Chrome 9 and above
- Edge 12 and above
- Firefox 15 and above
- Internet Explorer 10 and above
- Opera 12.1 and above
- Safari 5.1 and above
We have a Cheat Sheet on Javascript where we covered all the important topics of Javascript to check those please go through Javascript Cheat Sheet-A Basic guide to JavaScript.
Last Updated :
03 Jan, 2023
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