JavaScript Math cbrt()

In this tutorial, you will learn about the JavaScript Math.cbrt() method with the help of examples.

The cbrt() method computes the cube root of a specified number and returns it.


// cube root of 8
let number = Math.cbrt(8);

// Output: 2

cbrt() Syntax

The syntax of the Math.cbrt() method is:


Here, cbrt() is a static method. Hence, we are accessing the method using the class name, Math.

cbrt() Parameter

The cbrt() method takes a single parameter:

  • number - value whose cube root is to be calculated

cbrt() Return Value

The cbrt() method returns:

  • the cube root of a given number
  • NaN (Not a Number) if the argument is non-numeric

Example 1: JavaScript Math.cbrt()

// cbrt() with an integer number let number1 = Math.cbrt(27);
// cbrt() with a decimal number let number2 = Math.cbrt(64.144);
console.log(number2); // Output: // 3 // 4.002997752808288

Here, we have used the Math.cbrt() method to compute the cube root of an integer value, 27 and a decimal value, 64.144.

Example 2: cbrt() with Numeric String

// cbrt() with a numeric string let number2 = Math.cbrt("125");
console.log(number2); // Output: 5

In the above example, the Math.cbrt() method converts the numeric string "125" into a number and then computes its cube root.

Example 3: Cube Root of String Argument

let string = "Harry";

// cbrt() with string as argument let number = Math.cbrt(string);
console.log(number); // Output: NaN

In the above example, we have tried to calculate the cube root of the string "Harry". That's why we get NaN as the output.

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