GO language

First example:

// You can edit this code!
// Click here and start typing.
package main

import "fmt"

func main() {
    fmt.Println("Hello, world!")
}

package main

// fib returns a function that returns
// successive Fibonacci numbers.
func fib() func() int {
    a, b := 0, 1
    return func() int {
        a, b = b, a+b
        c = 256
        return a
    }
}

func main() {
    f := fib()
    // Function calls are evaluated left-to-right.
    println(f(), f(), f(), f(), f())
}

Another Example:

/*
    This is a long comment
    Second line.
*/
package main

import (
    "fmt"
    "github.com/hoisie/web.go"
)

type mytype struct {
    A   string
    B   string
    C   int
    D   int64
    E   uint8
    F   complex128
    G   float32
}

var page = `
    This is a long string
    This is another string
`

func index() string { return page }

func process(ctx *web.Context) string {
    var data mytype
    ctx.UnmarshalParams(&data)
    return fmt.Sprintf("%v\n", data)
}

func main() {
    web.Get("/", index)
    web.Post("/process", process)
    web.Run("0.0.0.0:9999")
}