Variables | Constants | Types in Swift are created using var for variables and let for constants.
let number = 3 // Creates a constant with an integer value
var decimal = 3.0 // Creates a variable with a Double value
Swift has basic types such as Int, Float, Double, String, and Bool, and it also allows you to create custom types, but this is more advanced content.
var integer = 3 // Type Int
var float = 0.11111 // Type Float, with up to 6 decimal places of precision
var double = 0.11111111111111 // Type Double, with up to 15 decimal places of precision
var string = "Marcos" // Type String, a single-line string
var multiLineString = """
This is
a multi-line
string
""" // Type String, to create a multi-line string, we use triple quotes ("""") at the beginning and end
var boolean = true // Type Boolean (Bool), which holds a true or false value
As you may notice, in Swift, most of the time we don't need to explicitly specify the type. This is due to Type Inference, which automatically assigns the appropriate type to the variable or constant based on the value assigned to it.
Top comments (0)