Go (also called Golang) is a statically typed, compiled programming language designed at Google. It emphasizes simplicity, safety, and efficiency. Go is particularly well-suited for concurrent programming, building web servers, microservices, and command-line tools.
Go compiles to a single binary with no dependencies, making deployment simple and fast.
// main.go
package main
import (
"fmt"
"strings"
)
func main() {
fmt.Println("Hello, Go!")
// Variables
name := "Alice" // short declaration
var age int = 30
fmt.Printf("Name: %s, Age: %d\n", name, age)
// Slices (dynamic arrays)
fruits := []string{"apple", "banana", "cherry"}
fruits = append(fruits, "date")
fmt.Println(fruits)
// Maps
scores := map[string]int{
"Alice": 95,
"Bob": 87,
}
scores["Charlie"] = 92
// Range loop
for name, score := range scores {
fmt.Printf("%s: %d\n", name, score)
}
// String operations
upper := strings.ToUpper("hello")
fmt.Println(upper)
}