| 1 | package main |
| 2 | |
| 3 | import ( |
| 4 | "fmt" |
| 5 | "strings" |
| 6 | ) |
| 7 | |
| 8 | // Person struct definition |
| 9 | type Person struct { |
| 10 | Name string |
| 11 | Age int |
| 12 | } |
| 13 | |
| 14 | // Method on Person |
| 15 | func (p Person) Greet() { |
| 16 | fmt.Printf("Hello, I'm %s and I'm %d years old\n", p.Name, p.Age) |
| 17 | } |
| 18 | |
| 19 | func fibonacci(n int) int { |
| 20 | if n <= 1 { |
| 21 | return n |
| 22 | } |
| 23 | return fibonacci(n-1) + fibonacci(n-2) |
| 24 | } |
| 25 | |
| 26 | func main() { |
| 27 | // Variable declarations |
| 28 | var message string = "Hello, Go!" |
| 29 | count := 42 |
| 30 | pi := 3.14159 |
| 31 | |
| 32 | fmt.Println(message) |
| 33 | |
| 34 | // Create a person |
| 35 | person := Person{Name: "Bob", Age: 25} |
| 36 | person.Greet() |
| 37 | |
| 38 | // Slice and loop |
| 39 | numbers := []int{1, 2, 3, 4, 5} |
| 40 | for i, num := range numbers { |
| 41 | if num%2 == 0 { |
| 42 | fmt.Printf("Index %d: %d is even\n", i, num) |
| 43 | } |
| 44 | } |
| 45 | |
| 46 | // Channel example |
| 47 | ch := make(chan string) |
| 48 | go func() { |
| 49 | ch <- "Goroutine message" |
| 50 | }() |
| 51 | |
| 52 | msg := <-ch |
| 53 | fmt.Println(msg) |
| 54 | } |