JavaScript dataView.setFloat64() Method

The dataView.setFloat64() is an inbuilt function in dataView that is used to store a signed 64-bit float value at the specified location i.e, at byte offset from the start of the dataView. 

Syntax:  

dataView.setFloat64(byteOffset)

Parameters: It has the parameter byteOffset which is offset in byte i.e. from the start of the view where to read the data.

Return value: This function does not return anything.

Below are examples of the dataView.setFloat64() Method. 

Example: 

var buffer = new ArrayBuffer(20); 

var dataview1 = new DataView(buffer, 0, 10); 

dataview1.setFloat64(1, 12.22); 
console.log(dataview1.getFloat64(1)); 

Output: 

12.22

Example 2: 

// Creating buffer with size in byte
var buffer = new ArrayBuffer(20);

// Creating a view
var dataview1 = new DataView(buffer, 0, 10);

// put the data 56.24 at slot 1
dataview1.setFloat64(1, 56.24);
console.log(dataview1.getFloat64(1));

Output: 

56.24

Example 3: The below code sets the value of PI using Math.PI and gives the output as the value of PI. 

// Creating buffer with size in byte
var buffer = new ArrayBuffer(20);

// Creating a view with slot from o to 10
var dataview1 = new DataView(buffer, 0, 10);

// put the value of PI at slot 1
dataview1.setFloat64(1, Math.PI);
console.log(dataview1.getFloat64(1));

Output:  

3.141592653589793

Example 4: When there is no data to be stored then it gives the output as NaN i.e, not a number. 

// Creating buffer with size in byte
var buffer = new ArrayBuffer(20);

// Creating a view
var dataview1 = new DataView(buffer, 0, 10);

// putting no data at slot 1
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.