條件語句

if 條件 then  
    ...  
else if 條件 then   
    ...  
else  
    ...  
end if  

舉例：

set num to 14
if num is 13 then   -- 不能使用== ，只能使用is表示相等
    set num to 13 * 2
else if num is 14 then
    set num to 14 * 2   
else
    set num to num * 5
end if

循環(huán)語句

語法1：
repeat 循環(huán)次數(shù) times
end repeat
舉例：

set num to 2
repeat 3 times
    set num to num * 2
end repeat

語法2：
repeat with 計(jì)數(shù)變量 from 計(jì)數(shù)變量初始值 to 計(jì)數(shù)變量目標(biāo)值 by 每次增量
end repeat
注:by省略時(shí)，默認(rèn)值為1
舉例：

set num to 2
repeat with i from 2 to 4 by 1 //i初值為2，每次增長1，直到4 
    set num to num * i
end repeat

語法3：
repeat while 條件
end repeat
舉例:

repeat while num < 100
    set num to num * 2
end repeat

語法4：
repeat until 條件
end repeat
舉例

set num to 2
repeat until num > 100
    set num to num * 2
end repeat

語法5：
repeat with 單個(gè)元素名 in 循環(huán)對(duì)象
end repeat

舉例

set arr to {"張三", "李四", "王五", "謝六"}
set appendStr to ""
repeat with nameStr in arr
    set appendStr to appendStr & nameStr
end repeat