Variable and type in GoLang

starter-golang.go

package main

import (
    "fmt"
)

func main(){
    x,y:=3,4            // Assignment
    x,y=y,x             // Swap

    a:=[]int{2,3,5}     // Slice [Array]
    b:=[]int{1}
    m := map[string]int{"three": 3, "four": 4}  // Map [Associative Array]
    m["one"] = 1

    _,_,_,_=x,y,a,b     // Remove error if unused

    b=append(b,a...)    // Merge two slices
    fmt.Println("Hello World!") // Print String
    fmt.Println(sumProd(x,y))   // Print returned value from function
    fmt.Println(b)              // Print Array
    fmt.Println(m["three"])     // Print from Map
}

func sumProd(x,y int)(sum, prod int){           // Arguments and return value
    return x+y,x*y              // Can return multiple values
}