Golang之（if）流程控制

package main

import (
    "fmt"
)

func testIf1() {
    num := 10
    //var num int
    //num = 10
    if num%2 == 0 {
        fmt.Printf("num:%d is even\n", num)
    } else {
        fmt.Printf("num:%d is odd\n", num)
    }

    fmt.Printf("num=%d\n", num)
}

func testIf2() {
    num := 10
    if num > 5 && num < 10 {
        fmt.Printf("num:%d is > 5 and < 10\n", num)
    } else if num >= 10 && num < 20 {
        fmt.Printf("num:%d is > 10 and < 20\n,", num)
    } else if num >= 20 && num < 30 {
        fmt.Printf("num:%d is > 20 and < 30\n", num)
    } else {
        fmt.Printf("num:%d is > 30\n", num)
    }
}

func testIf3() {
    //num := 10
    //var num int
    //num = 10
    if num := 11; num%2 == 0 {
        fmt.Printf("num:%d is even\n", num)
    } else {
        fmt.Printf("num:%d is odd\n", num)
    }

    //fmt.Printf("num=%d\n", num)
}

func getNum() int {
    return 1
}

func testIf4() {
    //num := 10
    //var num int
    //num = 10
    if num := getNum(); num%2 == 0 {
        fmt.Printf("num:%d is even\n", num)
    } else {
        fmt.Printf("num:%d is odd\n", num)
    }

    //fmt.Printf("num=%d\n", num)
}

func main() {
    //testIf1()
    //testIf2()
    //testIf3()
    testIf4()
}