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JavaScript Math cbrt() Method

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  • Last Updated : 02 Jan, 2023
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The Math.cbrt() method is used to find the cube root of a number. 



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

  • x: This parameter is simply a number whose cube root needs to be found.

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

Example: Below is an example of the Math.cbrt() Method.


<script type="text/javascript">
    console.log("cbrt of 64 : "
                        + Math.cbrt(64));
    console.log("cbrt of 27: "
                        + Math.cbrt(27));
    console.log("cbrt of 0: "
                        + Math.cbrt(0));
    console.log("cbrt of -1: "
                        + Math.cbrt(-1));
    console.log("cbrt of -27: "
                        + Math.cbrt(-27));
    console.log("cbrt of Infinity : "
                        + Math.cbrt(Infinity));


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

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


<script type="text/javascript">
    console.log("cbrt of 8 : "
                        + Math.cbrt(8));


cbrt of 8 : 2

Example: Errors and Exceptions, it is an error case because the cube root of a complex number can not be found which is why its parameter gives error. 


<script type="text/javascript">
    // Cube root of complex number can
    // not be calculated.
    console.log("cbrt of Complex no : "
                    + Math.cbrt(1 + 2i));


Error: Invalid or unexpected token

Example: The cube root of the string can not be found which is why the string parameter of the function gives NaN i.e, not a number. Only integer value can be used as the parameter for the function. 


<script type="text/javascript">
    // Only number can be used as the parameter
    // here string as parameter gives NaN i.e,
    // not a number.
    console.log("cbrt of a string : "
                        + Math.cbrt("gfg"));


cbrt of a string: NaN

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


<script type="text/javascript">
    // Here the Math.cbrt() function
    // calculates cube root for
    // different numbers taken as
    // function's parameter.
    console.log("Output : "
                    + Math.cbrt(125));
    console.log("Output : "
                    + Math.cbrt(23));


Output : 5
Output : 2.8438669798515654

We have a complete list of Javascript Math Objects methods, to check those please go through this Javascript Math Object Complete reference article.

Supported Browsers:

  • Google Chrome 38.0
  • Internet Explorer 12.0
  • Firefox 25.0
  • Opera 25.0
  • Safari 8.0

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