Go - functions as values
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Go programming language provides the flexibility to create functions on the fly and use them as values. In the following example, we've initialized a variable with a function definition. Purpose of this function variable is just to use inbuilt math.sqrt() function. For example −
Live Demopackage main import ("fmt" "math") func main(){ /* declare a function variable */ getSquareRoot := func(x float64) float64 { return math.Sqrt(x) } /* use the function */ fmt.Println(getSquareRoot(9)) }
When the above code is compiled and executed, it produces the following result −
3
go_functions.htm
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