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if

package main

import (
	"fmt"
	"math"
)

func sqrt(x float64) string {
	if x < 0 {
		return sqrt(-x) + "i"
	}
	return fmt.Sprint(math.Sqrt(x))
}

func pow(x, n, lim float64) float64 {
	// Like for, the if statement can start with a short statement to execute before the condition.
	// Variables declared inside an if short statement are also available inside any of the else blocks.
	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() {
	if !(1 == 2) {
		fmt.Println("true")
	}

	fmt.Println(sqrt(2), sqrt(-4))

	fmt.Println(
		pow(3, 2, 10),
		pow(3, 3, 20),
	)
}