Learn Golang in 30 Minutes

learngo.go

// REFERENCE (Learn Golang in 12 Minutes): https://www.youtube.com/watch?v=C8LgvuEBraI

package main

import (
        "fmt"
)

func main() {

        // functions
        fmt.Println("hello, golang!")

        // variables
        var x int = 4
        y := 7 // use walrus tooth operator to infer type

        // if statements
        if (x == 5) {
                fmt.Println("x equals five!")
        } else if (x != 5 && y == 7) {
                fmt.Println("x does not equal five, but y equals seven...")
        } else {
                fmt.Println("I dunno man?")
        }

        // arrays (fixed length)
        var a [5]int
        a[0] = 100
        a[1] = 101
        a[2] = 102
        a[3] = 103
        a[4] = 104
        fmt.Println(a[0])

        // slices (adjustable length "array")
        var b []int 
        b = append(b, 200)
        b = append(b, 201)
        b = append(b, 202)
        b = append(b, 203)
        b = append(b, 204)
        fmt.Println(b[0])

        // maps (key value pairs, "dictionary")
        c := make(map[string]int)
        c["foo"] = 300
        c["bar"] = 301
        c["baz"] = 302
        fmt.Println(c["foo"])


        // loops
        // (no while loops in golang, only for loops!)
        for i:= 0; i < 5; i++ {
                fmt.Println(i)
        }

        // if you need something like a while loop, 
        // this can be accomplished with a for loop
        // like so...
        j := 0
        for j < 1 {
                fmt.Println("look at me go!")
                fmt.Println("just kidding... lets shut it down!")
                j = 1
        }
        
}