Skip to content
Related Articles

Related Articles

Improve Article

JavaScript dataView.setFloat64() Method

  • Difficulty Level : Easy
  • Last Updated : 10 Oct, 2021
Geek Week

Below is the example of the dataView.setFloat64() Method. 
 

  • Example: 
     

javascript




<script>
var buffer = new ArrayBuffer(20);
 
var dataview1 = new DataView(buffer, 0, 10);
 
dataview1.setFloat64(1, 12.22);
document.write(dataview1.getFloat64(1));
</script>
  • Output: 
     
12.22

The dataView.setFloat64() is an inbuilt function in dataView which 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 parameter byteOffset which is offset in byte i.e. from the start of the view were to read the data.
Return value: This function does not return anything.
Example 1: 
 

Input: dataview1.setFloat64(1, 56.24);
Output: 56.24

Example 2: 
 

Input: dataview1.setFloat64(1, Math.PI); 
Output: 3.141592653589793

JavaScript code to show the working of this method: 
Code #1: 
 



javascript




<script>
 
   // 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);
   document.write(dataview1.getFloat64(1));
    
</script>

Output: 
 

56.24

Code #2: 
The below code sets the value of PI using Math.PI and gives the output as the value of PI. 
 

javascript




<script>
 
   // 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);
   document.write(dataview1.getFloat64(1) + "<br>");
    
</script>

Output: 
 

3.141592653589793

Code #3: 
When there is no data to be stored then it gives the output as NaN i.e, not a number. 
 

javascript




<script>
 
   // 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);
   document.write(dataview1.getFloat64(1) + "<br>");
    
</script>

Output: 
 

NaN

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

 

Hey geek! The constant emerging technologies in the world of web development always keeps the excitement for this subject through the roof. But before you tackle the big projects, we suggest you start by learning the basics. Kickstart your web development journey by learning JS concepts with our JavaScript Course. Now at it’s lowest price ever!




My Personal Notes arrow_drop_up
Recommended Articles
Page :