Ios8:swift (1)

Fundamental types:

Int Double Float Bool String

Collection types:

Array Dictionary

Declare constants with ' let '

Declare variables with "var"

with annotation (rarely used

eg

Let a:string= "good";    var msg:string= "Hello"; var a,b,c:double;

To show a constant or variable with println (followed by a line break) or print

Comments://(single line) or/* */(Multiline)

integers:signed and unsigned integer

8,16,32,64bit, prefer Int

In 32-bit system, INT and Int32 has same size

In 64-bit system, INT and Int64 has same size

Floating-point number:

Double:64bit (digits decimal)

Float:32bit (6 decimal digits)

This article is from the "Phoenixisland" blog, make sure to keep this source http://phoenix2012.blog.51cto.com/1799358/1561928

Ios8:swift (1)