54 lines
No EOL
1 KiB
Go
54 lines
No EOL
1 KiB
Go
package main
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import (
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"fmt"
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"time"
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)
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func main() {
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// Basic switch default is optional
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i := 2
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fmt.Print("Write", i, " as ")
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switch i {
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case 1:
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fmt.Println("one")
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case 2:
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fmt.Println("two")
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case 3:
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fmt.Println("three")
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}
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// Commas can seperate multiple expressions in the same case statement.
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switch time.Now().Weekday() {
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case time.Saturday, time.Sunday:
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fmt.Println("It's the weekend")
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default:
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fmt.Println("It's a weekday")
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}
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//switch without an expression is a alternate way to express if/else logic
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t := time.Now()
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switch {
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case t.Hour() < 12:
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fmt.Println("It's before noon")
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default:
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fmt.Println("It's afte noon")
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}
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// a type switch compares types instead of values.
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//you can use this to discorver the type of an interface value.
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whatAmI := func(i interface{}){
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switch t := i.(type) {
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case bool:
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fmt.Println("I'm a bool")
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case int:
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fmt.Println("I'm an int")
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default:
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fmt.Printf("Don't know the type %T\n",t)
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}
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}
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whatAmI(true)
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whatAmI(1)
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whatAmI("hey")
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} |