Go Functions

package main

import "fmt"

// Regular function
func greetUser(name string) string {
    return "Hello, " + name
}

// Function that takes a function as parameter
func applyOperation(x int, y int, op func(int, int) int) int {
    return op(x, y)
}

// Anonymous function (lambda)
func main() {
    message := greetUser("Alice")
    fmt.Println(message)
    
    // Pass a function as an argument
    add := func(a int, b int) int {
        return a + b
    }
    
    result := applyOperation(5, 3, add)
    fmt.Println(result)  // 8
    
    // Inline anonymous function
    result2 := applyOperation(5, 3, func(a int, b int) int {
        return a * b
    })
    fmt.Println(result2)  // 15
}