math package of GO provides a Sqrt method that can be used to get the cube root of that number.

Below is the signature of the function. It takes input a float and also returns a float.

func Sqrt(x float64) float64

Some special cases of Sqrt function are

• Sqrt(±0) = ±0
• Sqrt(±Inf) = ±Inf
• Sqrt(x < 0) = NaN
• Sqrt(NaN) = NaN

Code:

package main

import (
	"fmt"
	"math"
)

func main() {
	//Square root of a integer
	res := math.Sqrt(4)
	fmt.Println(res)

	//Square root of a integer
	res = math.Sqrt(9)
	fmt.Println(res)

	//Square Root of a float
	res = math.Sqrt(30.33)
	fmt.Println(res)

	//Square Root of a negative number
	res = math.Sqrt(-9)
	fmt.Println(res)
}

Output:

2
3
5.5072679252057455

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