package main

import (
    "fmt"
    "math"
)

func pow(x, n, lim float64) float64 {
    if v := math.Pow(x, n); v < lim {
        return v
    } else {
        // v still defined.
        fmt. Printf("%g >= %g\n", v, lim)
//        return v
    }
    // v no longer defined.
    // unless specified in "else" block, must be specified here. Will only be invoked when "if" is not true.
    return lim
}

func main() {
    var pow_vals = [][]float64{
        {3, 2, 10},
        {3, 3, 10},
    }

    for _, powval := range pow_vals {
        fmt.Println( pow(powval[0], powval[1], powval[2]) )
    }
}