Golang Program that uses func as Local Variable

package main

import "fmt"

func main() {

    // local variable definition
    var x int = 150
    var y int = 360
    var ret int

    // calling a function to get max value
    // and storing its value in a variable
    ret = max(x, y)

    fmt.Printf("Maximum value is : %d\n", ret)
}

// function returning the max between two numbers
func max(number1, number2 int) int {

    var result int

    if number1 > number2 {
        result = number1
    } else {
        result = number2
    }
    return result
}

// Golang program that uses func
// as a local variable
package main

import (
    "fmt"
    "strings"
)

func main() {

    // assigning function f to a variable f1
    f1 := func(f rune) bool {

        // Return true if underscore
        // or space rune.
        return f == '_' ||
            f == ' '
    }

    val := "geeks1 geeks2"

    // Pass func object to IndexFunc method.
    // Here f1 is a function argument
    finalresult := strings.IndexFunc(val, f1)
    fmt.Println(finalresult)

    val = "geeks1_geeks2"
    finalresult = strings.IndexFunc(val, f1)
    fmt.Println(finalresult)
}