JavaScript | dataView.setFloat64()

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 where to read the data.
Return value: This function does not return anything.

JavaScript code to show the working of this method:

Code #1:

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<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>

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Output:


56.24


Code #2:

Below code set the value of PI using Math.PI and gives output as the the value of PI.











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<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> 



















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Output:


3.141592653589793


Code #3:

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











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<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> 



















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Output:


NaN



          
          
          
          

            

    

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