2.13. 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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