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JavaScript DataView.getFloat32() Method

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  • Difficulty Level : Basic
  • Last Updated : 03 Jan, 2023
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The dataView.getFloat32() is an inbuilt function in dataView that is used to get a 32-bit float at the specified location i.e, at byte offset from the start of the data view. The range of 32-bit floating-point numbers is from -3.4E+38 to +3.4E+38

Syntax: 

dataView.getFloat32(byteOffset)

Parameters: It has the parameter byteOffset which is offset in a byte and it says where to read the data from the beginning(start) of the view.

Return value: It returns 32-bit signed float number.

Examples:

Input: dataview1.setFloat32(1, 56.34);
Output: 56.34000015258789
Input: dataview1.setFloat32(1, Math.PI);
Output: 3.1415927410125732

Below are examples of the dataView.getFloat32() Method. 

Example 1: 

javascript




var buffer = new ArrayBuffer(20);
var dataview1 = new DataView(buffer, 0, 10);
dataview1.setFloat32(1, 12.01);
conosole.log(dataview1.getFloat32(1));

Output:  

12.010000228881836

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 56.34 at slot 1
dataview1.setFloat32(1, 56.34);
console.log(dataview1.getFloat32(1) + "<br>");

Output: 

56.34000015258789

Example 3: Not only float value but also a math function like Math.PI can be taken as the parameter of the function. 

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

Output: 

3.1415927410125732

Example 4: When there is no data to be stored, then it returns 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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