Go
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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)
}