Swift Basic Data Types & Type Inference

5 (1)

Swift is strongly typed, data should either be explicitly assigned or inferred, the main basic data types that come with swift are

Type	Description
Character	a 16-bit Unicode character like “a” or “/”
String	represents textual data like “Hello”
Float	represents 32-bit floating-point number
Double	represents 64-bit floating-point number
Bool	logical value: true or false
Tuples	groups multiple values in single value
Int	integer, a whole number
UInt	unsigned integer, a whole number
Int8	1 byte integer
Int32	4 bytes integer
Int64	8 bytes integer
UInt8	1 byte unsigned integer
UInt32	4 bytes unsigned integer
UInt64	8 bytes unsigned integer

On a 32-bit device, Int has the size of Int32, on 64-bit devices, Int has the size of Int64, same goes for UInt.

Swift has a feature where it can infer the type of the data directly, for example the variable level here is infered to be an Int

var level = 12

you can explicitly determine the type directly

var level: Int = 17

Extra Tip: A CGFloat holds either 32-bits of data or 64-bits of data depending on the CPU Architecture.