print("Hello World")
//printing a value
let num = 5
print(num)
print("a num: " + num) //concatenation
print("a num: \(num)") //interpolation

var str1 = "Hello, world"
print(str1)

// Create a literal empty string
var emptyString = ""
// Create an optional string
var emptyVariable: String? // This allows this variable to have a null value, or nil in swift

print("Good Morning!")
print("It's rainy today")