Grundlegende Syntax

        
          package main

import (
    "fmt"
    "math"
)

// Main function - entry point
func main() {
    // Variables
    var name string = "John"
    age := 25  // Short variable declaration
    height := 1.75

    // Constants
    const PI = 3.14159
    const (
        Sunday = iota  // 0
        Monday         // 1
        Tuesday        // 2
    )

    // Arrays
    var numbers [5]int = [5]int{1, 2, 3, 4, 5}
    names := [3]string{"Alice", "Bob", "Charlie"}

    // Slices (dynamic arrays)
    var slice []int
    slice = append(slice, 1, 2, 3)
    dynamicSlice := []int{4, 5, 6}

    // Maps
    person := map[string]interface{}{
        "name":   "John",
        "age":    25,
        "active": true,
    }

    // Printing
    fmt.Println("Hello, World!")
    fmt.Printf("Name: %s, Age: %d\n", name, age)
    fmt.Printf("PI: %.2f\n", PI)
    fmt.Printf("Square root of 16: %.2f\n", math.Sqrt(16))

    // Loops
    for i := 0; i < len(numbers); i++ {
        fmt.Printf("numbers[%d] = %d\n", i, numbers[i])
    }

    // Range loop
    for index, value := range slice {
        fmt.Printf("slice[%d] = %d\n", index, value)
    }

    // Map iteration
    for key, value := range person {
        fmt.Printf("%s: %v\n", key, value)
    }
}