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A Tour of Go If and else

Variables declared inside an if short statement are also available inside any of the else blocks.

 

 

package main  import (    "fmt"    "math")func pow(x, n, lim float64) float64{    if v := math.Pow(x, n); v < lim {        return v    } else {        fmt.Printf("%g >= %g\n", v, lim)    }    //can‘t use v here, though    return lim}func main() {    fmt.Println(        pow(3, 2, 10),        pow(3, 3, 20),        )}

 

A Tour of Go If and else