Go language functions as arguments

Go language has the flexibility to create functions and use them as arguments to another function. In the following example, we initialize a variable in a defined function just to use the built-in function math.sqrt() , an example is:

package main
import (
   "fmt"
   "math"
)
func main(){
   /* Declare function variables */
   getSquareRoot := func(x float64) float64 {
      return math.Sqrt(x)
   }
   /* Using functions */
   fmt.Println(getSquareRoot(9))
}

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