JavaScript Math.cbrt() is a built-in function that is used to find the cube root of a number. The function accepts a single parameter, simply a number whose cube root needs to find. It returns a cube root of the given number.
Syntax
Math.cbrt(x)Parameter(s)
The variable x, whose cube root value is to be determined.
Return Value
The cube root value.
Example 1
See the following code.
var a = 8;
var b = 27;
var c = 64;
var d = -64;
console.log(Math.cbrt(a));
console.log(Math.cbrt(b));
console.log(Math.cbrt(c));
console.log(Math.cbrt(d));Output
2
3
4
-4Example 2
The following example demonstrates a case where values other than valid numbers are passed.
var a = "Hello, world";
var b;
console.log(Math.cbrt(a));
console.log(Math.cbrt(b));Output
NaN
NaNExample 3
console.log(Math.cbrt(2 + i));
Output
ReferenceError: i is not definedExample 4
The following example demonstrates the use of polyfill for the cbrt() method.
var a = 8;
var b = 27;
var c = 64;
var d = -64;
function polyfill(x) {
return Math.round(x < 0 ? -Math.pow(-x, 1 / 3) : Math.pow(x, 1 / 3));
}
console.log(Math.cbrt(a));
console.log(Math.cbrt(b));
console.log(Math.cbrt(c));
console.log(Math.cbrt(d));
console.log();
console.log(polyfill(a));
console.log(polyfill(b));
console.log(polyfill(c));
console.log(polyfill(d));Output
2
3
4
-4
2
3
4
-4That’s it.
