Golang golang-fibonacci (snippet)

Go programming example 'golang-fibonacci'

golang-fibonacci

Golang beginners example: golang-fibonacci

package main

// import required modules
import (
    "flag"
    "fmt"
    "strconv"
    "time"
)

var x uint64

func main() {
    start := time.Now()
    flag.Parse()
    s := flag.Arg(0)

    if s == "" {
        s = "140"
    }

    x, err := strconv.ParseUint(s, 10, 0)

    if err != nil {
        fmt.Println(err)
        x = 40
    }

    fibonacci(x)
    elapsed := time.Since(start)
    fmt.Println("\ntime:", elapsed)
}

func fibonacci(n uint64) {
    var a uint64 = 0
    var b uint64 = 1
    var i uint64
    var sum uint64
    for i = 0; i < n; i++ {
        fmt.Println(a)
        sum = a + b
        a = b
        b = sum
    }
}

Useful links

• Learn Go: https://golangr.com
• Download Go: https://golang.org