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 have same size
in 64-bit system, Int and Int64 have same size
Floating-point number:
Double: 64bit(15 decimal digits)
Float: 32bit(6 decimal digits)
本文出自 “phoenixIsland” 博客，请务必保留此出处http://phoenix2012.blog.51cto.com/1799358/1561928
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