Adds egs for constants, variables and scope

ch1/constants.go

@@ -0,0 +1,8 @@
+package main
+
+import "fmt"
+
+func main() {
+	const PI float32 = 3.14
+	fmt.Println(PI)
+}

ch1/dMultiVars.go

@@ -0,0 +1,12 @@
+package main
+
+import "fmt"
+
+func main() {
+	var (
+		a = 5
+		b = 10
+		c = 15
+	)
+	fmt.Println(a + b + c)
+}

ch1/doublesIt.go

@@ -0,0 +1,13 @@
+package main
+
+import "fmt"
+
+func main() {
+	fmt.Print("Enter a number: ")
+	var input float64
+	fmt.Scanf("%f", &input)
+
+	output := input * 2
+
+	fmt.Println(output)
+}

ch1/variables.go

@@ -0,0 +1,34 @@
+package main
+
+import "fmt"
+
+func main() {
+	var name string = "Ashwin Hegde"
+	fmt.Println(name)
+
+	var workAs string
+	workAs = "Software Engineer"
+	fmt.Println(workAs)
+
+	var x string
+	x = "first"
+	fmt.Println(x)
+	x = "second"
+	fmt.Println(x)
+
+	var y string
+	y = "first "
+	fmt.Println(y)
+	y = y + "second"
+	fmt.Println(y)
+
+	var p string = "Hello"
+	var q string =  "World"
+	fmt.Println(p == q)
+
+	r := 5
+	fmt.Println(r)
+
+	fullname := "Ashwin Hegde"
+	fmt.Println("My name is", fullname)
+}

ch1/varscope.go

@@ -0,0 +1,13 @@
+package main
+
+import "fmt"
+
+var name string = "Ashwin"
+func main() {
+	fmt.Println("My name is ", name)
+	fullname()
+}
+
+func fullname() {
+	fmt.Println("My fullname is ", name + "Hegde") 
+}