Golang基础-Switch

• 不需要手动break
• default是找不到case时执行
• 可以对多个case执行同样的操作

operatingSystem := "windows"

switch operatingSystem {
case "windows", "linux":
    // do something if the operating system is windows or linux
case "macos":
    // do something if the operating system is macos
default:
    // do something if the operating system is none of the above
}

• 空switch根据case的真伪选择是否执行

age := 21

switch {
case age > 20 && age < 30:
    // do something if age is between 20 and 30
case age == 10:
    // do something if age is equal to 10
default:
    // do something else for every other case
}

• fallthrough语句实现case继续向下，就像C的switch不写break

age := 21

switch {
case age > 20:
    // do something if age is greater than 20
    fallthrough
case age > 30:
    // Since the previous case uses 'fallthrough',
    // this code will now run if age is also greater than 30
default:
    // do something else for every other case
}