Go

http://golang.org/

''Go is an open source programming language that makes it easy to build simple, reliable, and efficient software. ''

Example: package main

import "fmt"

// 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 return a	} }

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

// Concurrent computation of pi. // See http://goo.gl/ZuTZM. // // This demonstrates Go's ability to handle // large numbers of concurrent processes. // It is an unreasonable way to calculate pi. package main

import (	"fmt"	"math" )

func main { fmt.Println(pi(5000)) }

// pi launches n goroutines to compute an // approximation of pi. func pi(n int) float64 { ch := make(chan float64) for k := 0; k <= n; k++ { go term(ch, float64(k)) }	f := 0.0 for k := 0; k <= n; k++ { f += <-ch }	return f }

func term(ch chan float64, k float64) { ch <- 4 * math.Pow(-1, k) / (2*k + 1) }