Trusted answers to developer questions
Trusted Answers to Developer Questions

Related Tags

golang

# What is the Cbrt function in Golang?

Faraz Karim

Grokking Modern System Design Interview for Engineers & Managers

Ace your System Design Interview and take your career to the next level. Learn to handle the design of applications like Netflix, Quora, Facebook, Uber, and many more in a 45-min interview. Learn the RESHADED framework for architecting web-scale applications by determining requirements, constraints, and assumptions before diving into a step-by-step design process.

The Go programming language uses the Cbrt function to find the cubic root of a number.

To use this function, you must import the math package in your file and access the Cbrt function within it using the . notation (math.Cbrt). Here, Cbrt is the actual function, while math is the Go package that stores the definition of this function.

## Function definition

The definition of the Cbrt function inside the math package is:

## Parameters

The Cbrt function takes a single argument of type float64. This is the number you will want to find the cube root of.

## Return value

The Cbrt function returns a single value of type float64. This value represents the cube root of the argument.

Below are two types of return values that are only used by the function under certain circumstances:

• NAN: Not a number, or NAN, is returned in all cases where the input argument is an undefined numeric value.

• + Inf: This is returned if the input value is positive infinity or equivalent.

• - Inf: This is returned if the input value is negative infinity or equivalent.

## Examples

Below is a simple example where we find out the cube-root of a positive number:

package mainimport "fmt"import "math"func main() {	var x  float64 = math.Cbrt(125)	fmt.Println(x)}

The following is a program that shows how the function will behave if it is given infinity as argument:

package mainimport "fmt"import "math"func main() {	var x  float64 = math.Cbrt(math.Inf(-1))	fmt.Println("Cuberoot of negative infinity is: ", x)}

RELATED TAGS

golang

CONTRIBUTOR

Faraz Karim 