Numeric types

Swift contains many of the standard numeric types that are suitable for storing various integer and floating-point values.

Integers

An integer is a whole number. Integers can be either signed (positive, negative, or zero) or unsigned (positive or zero). Swift provides several integer types of different sizes. The following chart shows the value ranges for the different Integer types:

Type	Minimum	Maximum
Int8	-128	127
Int16	-32,768	32,767
Int32	-2,147,483,648	2,147,483,647
Int64	- 9,223,372,036,854,775,808	9,223,372,036,854,775,807
Int	- 9,223,372,036,854,775,808	9,223,372,036,854,775,807
UInt8	0	255
UInt16	0	65,535
UInt32	0	4,294,967,295
UInt64	0	18,446,744,073,709,551,615
UInt	0	18,446,744,073,709,551,615

Tip

Unless there is a specific reason to define the size of an integer, I would recommend using the standard Int or UInt type. This will save you from needing to convert between different types of integers.

In Swift, Int (as well as other numerical...