Tutorial2 - Constants Variables and Basic Data Types

Author: Shikha-code36

README.md

@@ -43,3 +43,4 @@ go run tutorial1/main.go
 
 ### Topics covered:
 - [x] [Basics](tutorial1)
+- [x] [Constants Variables and Basic Data Types](tutorial2)

tutorial2/README.md

@@ -0,0 +1,54 @@
+# Constants, Variables and Basic Data Types in Go
+
+## Constants
+
+In Go, constants are declared like variables, but with the `const` keyword. Constants can be character, string, boolean, or numeric values. Constants cannot be declared using the `:=` syntax.
+
+```go
+const Pi = 3.14
+```
+
+
+## Variables
+
+Variables in Go are explicitly declared and used by the compiler to e.g. check type-correctness of function calls.
+
+```go
+var x int = 1
+y := 2 // Short variable declarations, infer the type based on the assigned value
+```
+
+## Basic Data Types
+
+Go's basic types are:
+
+```go
+bool
+
+string
+
+int  int8  int16  int32  int64
+uint uint8 uint16 uint32 uint64 uintptr
+
+byte // alias for uint8
+
+rune // alias for int32, represents a Unicode code point
+
+float32 float64
+
+complex64 complex128
+```
+
+The `int`, `uint`, and `uintptr` types are usually 32 bits wide on 32-bit systems and 64 bits wide on 64-bit systems.
+
+## Zero Values
+
+Variables declared without an explicit initial value are given their zero value. The zero value is:
+
+- `0` for numeric types,
+- `false` for the boolean type, and
+- `""` (the empty string) for strings.
+
+### Checkout the code
+
+ - [main.go](main.go)