Skip to content
Related Articles

Related Articles

Improve Article

JavaScript dataView.setFloat64() Method

  • Difficulty Level : Easy
  • Last Updated : 16 Sep, 2020

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

  • Example:




    <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:




<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.




<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.




<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
  • Internet Explorer
  • Firefox
  • Apple Safari
  • Opera



My Personal Notes arrow_drop_up
Recommended Articles
Page :