Get Programming with Go (6.4)

piggy.go

// Save some money to buy a gift for your friend.
// Write a program that randomly places nickels ($0.05), dimes ($0.10), and quarters ($0.25) into an empty piggy bank
// until it contains at least $20.00. Display the running balance of the piggy bank after each deposit,
// formatting it with an appropriate width and precision.

package main

import (
	"fmt"
	"math/rand"
)

func main() {
	for sum := 0.0; sum < 21.0; sum++ {
		if num := rand.Intn(3); num == 0 {
			sum += 0.05

		} else if num == 1 {
			sum += 0.10
		} else {
			sum += 0.25
		}

		fmt.Printf("$%.2f\n", sum)
	}

}