learning about golang variables

src/03-variables.go

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+package main
+
+import "fmt"
+
+func main() {
+  var a = "initial"
+  fmt.Println(a)
+
+  a = "changed"
+  fmt.Println(a)
+
+  var b, c int = 1, 2
+  fmt.Println("b=", b, ", c=", c)
+
+  var d = true
+  fmt.Println(d)
+
+  var e int
+  fmt.Println(e)
+
+  f := "short"
+  fmt.Println(f)
+
+  f = "changed short"
+  fmt.Println(f)
+}