Data types for Swift

A reference type is the passing of its own data when assigning or passing a parameter pair to a function, so that during the invocation of the function, the original data is affected and the class belongs to the reference type

1. Integral type:

Int8: Signed 8-bit integer type;

Int16: Signed 16-bit integer

Int32:

Int64:

INT: Platform-related signed integer

UInt8: Unsigned 8-bit integer

UInt16: Unsigned 16-bit integer

UInt32:

UInt64:

UINT: Platform-dependent unsigned integer

2, floating-point type

Float

Double:

How numbers are represented:

Assign a decimal, binary, hexadecimal to an integer variable, and they are represented as follows,

(1) Binary number: 0b bit prefix, 0 is Arabic numerals, B is English lowercase letters, can not be capitalized;

(28 binary: prefix 0o, 0 is Arabic numerals, 0 is English lowercase letters;

(3) 16 binary: prefix 0x, 0 is Arabic numerals

Conversions between numeric types:

(1) Conversion between integral types;

UInt8 (Var)

(2) Conversion between integral type and floating point;

Float (Var)

3. Boolean type

True

False

4, Character type

5, meta-group:

A tuple is a concept in a relational database, a table in which each row of data is a tuple, and each column is an attribute, and a tuple becomes a record in a two-dimensional table.

var stu0= ("Tony", "100", "1")

var stu1= ("name": "Tony", "id": "+", sex:1)

println (stu0.0)

println (Stu1.name)

Let (name,id,sex) =stu1

Let (name,id,_) =stu1

println (name)

println (ID)

println (Sex)

6. Collection

7. Enumeration

8. Structural Body

This article is from the "Ordinary Road" blog, please be sure to keep this source http://linjohn.blog.51cto.com/1026193/1619369

Data types for Swift