JavaScript Math cbrt() Method

Below is the example of the Math cbrt() Method.

  • Example:
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    <script type="text/javascript"> 
       document.write("cbrt of 64 : " 
                         + Math.cbrt(64) + "<br>");
       document.write("cbrt of 27: " 
                         + Math.cbrt(27) + "<br>"); 
       document.write("cbrt of 0: " 
                         + Math.cbrt(0) + "<br>"); 
       document.write("cbrt of -1: " 
                         + Math.cbrt(-1) + "<br>"); 
       document.write("cbrt of -27: " 
                         + Math.cbrt(-27) + "<br>"); 
       document.write("cbrt of Infinity : " 
                         + Math.cbrt(Infinity)); 
    </script> 

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  • Output:

    cbrt of 16: 4
cbrt of 27: 3
cbrt of 0: 0
cbrt of -1: -1
cbrt of -27: -3
cbrt of Infinity : Infinity
    

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The Math.cbrt() method is used to find cube root of a number.

Syntax:


Math.cbrt(x)


Parameters: This method accepts a single parameter as mentioned above and described below:


    

  • x: This parameter is a simply a number whose cube root need to be find.
    • 



Returns: It returns the cube root of the given number.

Below example illustrate the cbrt() method in JavaScript:

Example: Here cube root of 8 is calculated to 2 because when any 3 times repeated any number is present inside of the cube root then only one number is taken out as the value of the cube root.

∛8

= ∛2*2*2

= 2


Input: Math.cbrt(8)
Output : 2



More codes for the above method are as follows:




Program 1: Errors and Exceptions, it is an error case because cube root of complex number can not be found that is why its parameter gives error.













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<script type="text/javascript">  


  // Cube root of complex number can  


  // not be calculated. 


  document.write("cbrt of Complex no : " 


                   + Math.cbrt(1 + 2i)); 


</script>  



















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Output:


Error: Invalid or unexpected token



Program 2: Cube root of string can not be found that is why string parameter of the function gives NaN i.e, not a number. An only integer value can be used as the parameter for the function.











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<script type="text/javascript">  


   // Only number can be used as the parameter 


   // here string as parameter gives NaN i.e,  


   // not a number. 


   document.write("cbrt of a string : " 


                     + Math.cbrt("gfg")); 


</script>  



















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Output:


cbrt of a string: NaN


Program 3: Whenever we need to get cube root of any number that time we take the help of the Math.cbrt() function in JavaScript.











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<script type="text/javascript">  


   // Here the Math.cbrt() function  


   // calculates cube root for 


   // different numbers taken as  


   // function's parameter. 


   document.write("Output : " 


                  + Math.cbrt(125) + "<br>"); 


   document.write("Output : " 


                  + Math.cbrt(23) + "<br>");  


</script>  



















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Output:


Output : 5
Output : 2.8438669798515654



Supported Browsers:


    

  • Google Chrome 38.0
    • 

  • Internet Explorer 12.0
    • 

  • Firefox 25.0
    • 

  • Opera 25.0
    • 

  • Safari 8.0
    • 



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