Made changes to Hello, World!.md and Variables.md

Added a more detailed explanation of how go code is organised, and fmt
package in Hello, World!.md

Added details about boolean data type and multiline strings in
Variables.md

Author: shrn01

tutorials/learn-golang.org/en/Hello, World!.md

@@ -1,7 +1,44 @@
 Tutorial
 --------
 
-Welcome to the first tutorial. In this tutorial you will learn how to write your first line of code.
+Welcome to the first tutorial. This tutorial will guide you through your first go program.
+
+Golang is a modern statistically typed and compiled language from Google.
+
+In each golang program you need to define a package name at the top. So if you need to import your code into some other program you can use this package name to import. Execution of a golang project starts in the package `"main"`. So let's define our package as main.
+
+    package main
+
+Go follows a similar pattern as C and has a main function where the execution begins. In go functions are defined using `func` keyword.
+
+This is an example main function
+
+    func main () {
+
+    }
+
+Now to print something we need to use the Println function from the package `"fmt"`
+
+To import a function you just write import following the package name in "".
+
+    import "somemodule"
+
+
+Here is an example program to print "Hello World!"
+
+    package main
+
+    import "fmt"
+
+    func main () {
+        fmt.Println("This line is printed")
+    }
+
+We dont need to add semi colons after each line in Go. The compiler takes care of it.
+
+The `fmt` package also has a `Printf()` function similar to printf in C. It can be used in the same way as it is used in C.
+
+    fmt.Printf("%d is a number",10)
 
 Exercise
 --------

tutorials/learn-golang.org/en/Variables.md

@@ -3,6 +3,10 @@ Tutorial
 
 A variable is a name given to a storage area that the programs can manipulate. The name of a variable can be composed of letters, digits, and the underscore character. It must begin with either a letter or an underscore. 
 
+The general code to declare a variable in golang is 
+
+    var <name of variable> <type of variable>
+
 ### Numbers
 Variables are arithmetic types and represent the following values throughout the program.
     a) integer types 
@@ -33,6 +37,21 @@ Single quotes are not used to enable the use of apostrophes in strings without h
     var s string = "Don't worry about apostrophes"
     fmt.Println(s)
 
+We can also define multiple line strings wrapping the string in `` quotes.
+
+    var s string = `This is a string spanning multiple lines
+    This is the second line
+    And this is the third`
+
+    fmt.Println(s)
+
+### Booleans
+Golang supports boolean values with the keywords `true` and `false`
+
+Boolean variables are declared in go as follows
+
+    var b bool = true
+
 ### Shorthand Declaration
 The `:=` notation serves both as a declaration and as initialization.
 ``` foo := "bar" ``` is equivalent to ``` var foo string = "bar" ```
@@ -44,6 +63,7 @@ The `:=` notation serves both as a declaration and as initialization.
     e := "Hello"
     f := `Do you like golang, so far?`
     g := 'M'
+    h := true
 
     fmt.Println(a)
     fmt.Println(b)
@@ -52,6 +72,7 @@ The `:=` notation serves both as a declaration and as initialization.
     fmt.Println(e)
     fmt.Println(f)
     fmt.Println(g)
+    fmt.Println(h)
 
 
 
@@ -63,6 +84,7 @@ You must print out to the console the following:
     John Doe
     24
     154.61
+    true
 
 
 Tutorial Code
@@ -74,9 +96,11 @@ Tutorial Code
         name := "Chris Mien"
         age := 29
         weight := 200.21
+        isMale := false
         fmt.Println(name)
         fmt.Println(age)
         fmt.Println(weight)
+        fmt.Println(isMale)
     }
 
 
@@ -86,6 +110,7 @@ Expected Output
     John Doe
     24
     154.61
+    true
 
 
 Solution
@@ -97,7 +122,9 @@ Solution
         name := "John Doe"
         age := 24
         weight := 154.61
+        isMale := true
         fmt.Println(name)
         fmt.Println(age)
         fmt.Println(weight)
+        fmt.Println(isMale)
     }