Go编程基础-基础篇 4

package main

import (
	"fmt"
)

type Weekday int

const (
	Sun Weekday = iota
	Mon
	Tues
	Wed
	Thur
	Fri
	Sat
)

func main() {
	fmt.Println("Sun :", Sun)
	fmt.Println("Mon :", Mon)
	fmt.Println("Tues:", Tues)
	fmt.Println("Wed :", Wed)
	fmt.Println("Thur:", Thur)
	fmt.Println("Fri :", Fri)
	fmt.Println("Sat :", Sat)
}

Sun : 0
Mon : 1
Tues: 2
Wed : 3
Thur: 4
Fri : 5
Sat : 6

package main

import (
	"fmt"
)

func main() {
	a := 10
	if a > 10 {
		fmt.Println("a大于10")
	} else if a < 0 {
		fmt.Println("a小于0")
	} else {
		fmt.Println("a的值是", a)
	}
}

a的值是 10

package main

import (
	"fmt"
)

func main() {
	if a := 10; a > 10 {
		fmt.Println("a大于10")
	} else {
		fmt.Println("a的值是", a)
	}
}

a的值是 10

package main

import (
	"fmt"
)

func main() {
	a := "A"
	switch a {
	case "A", "a":
		fmt.Println("分数区间为90~100")
	case "B", "b":
		fmt.Println("分数区间为70~89")
	case "C", "c":
		fmt.Println("分数区间为0~70")
	default:
		fmt.Println("default")
	}
}

分数区间为90~100

package main

import "fmt"

func main() {
	a := 50
	switch {
	case a < 60:
		fmt.Println("不及格")
	case a < 80:
		fmt.Println("良好")
	case a <= 100:
		fmt.Println("优秀")
	default:
		fmt.Println("分数最多为100分")
	}
}

不及格