Basic Go Routines (like Threading)

· 194 words · 1 minute read
#async #fmt #go #goroutine #parallel #routine #sleep #thread #threading #time

This script basically just prints out the numbers 1 to 10, but it does so by spinning off each print statement into it’s own thread, using a go routine. You’ll notice the script also has a start and an end print statement, but because go routines are used, the end statement will be printed before and items (1-10) are printed.

The ending sleep allows the go routines to execute as they were being cut short by the main function finished, thus ending the programs life.

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package main

import (
    "fmt"
    "time"
)

func main() {
    fmt.Println("Start Script")

    for i := 0; i < 10; i++ {
        go printItem(i)
    }

    fmt.Println("End Script")

    // Wait, giving time for the go routines
    // to finish.
    time.Sleep(1000)
}

func printItem(i int) {
    fmt.Printf("Print Item: %v\n", (i + 1))
}

Output:

Start Script
End Script
Print Item: 1
Print Item: 2
Print Item: 3
Print Item: 4
Print Item: 5
Print Item: 6
Print Item: 7
Print Item: 8
Print Item: 9
Print Item: 10

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Author:  Edd Turtle

Edd is the Lead Developer at Hoowla, a prop-tech startup, where he spends much of his time working on production-ready Go and PHP code. He loves coding, but also enjoys cycling and camping in his spare time.

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