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JavaScript dataView.setFloat32() Method

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  • Last Updated : 02 Jan, 2023
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The dataView.setFloat32() is an inbuilt function in dataView that is used to store a signed 32-bit float value at the specified location i.e, at byte offset from the start of the dataView. 

Syntax:  

dataView.setFloat32(byteOffset)

Parameters: It has the parameter byteOffset which is offset in a byte and it says 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.setFloat32() Method. 

Example 1: 

javascript




var buffer = new ArrayBuffer(20);
 
var dataview1 = new DataView(buffer, 0, 10);
 
dataview1.setFloat32(1, 12.22);
console.log(dataview1.getFloat32(1));

Output:  

12.220000267028809

Example 2: 

javascript




// 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.setFloat32(1, 56.24);
console.log(dataview1.getFloat32(1));

Output: 

56.2400016784668

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

javascript




// 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.setFloat32(1, Math.PI);
document.write(dataview1.getFloat32(1));

Output:  

3.1415927410125732

Code #3:  When nothing as data is used to store then it gives the output as NaN i.e, not a number. 

javascript




// 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.setFloat32(1);
console.log(dataview1.getFloat32(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.  


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