Lua中關系運算符的使用教程

 　　這篇文章主要介紹了Lua中關系運算符的使用教程,是Lua學習入門中的基礎知識,需要的朋友可以參考下

　　下表列出了所有的Lua語言支持的關系運算符。假設變量A持有10和變量B持有20則：

　　示例

　　試試下面的例子就明白了所有的Lua編程語言提供的關系運算符：

　　代碼如下:

　　a = 21

　　b = 10

　　if( a == b )

　　then

　　print("Line 1 - a is equal to b" )

　　else

　　print("Line 1 - a is not equal to b" )

　　end

　　if( a ~= b )

　　then

　　print("Line 2 - a is not equal to b" )

　　else

　　print("Line 2 - a is equal to b" )

　　end

　　if ( a < b )

　　then

　　print("Line 3 - a is less than b" )

　　else

　　print("Line 3 - a is not less than b" )

　　end

　　if ( a > b )

　　then

　　print("Line 4 - a is greater than b" )

　　else

　　print("Line 5 - a is not greater than b" )

　　end

　　-- Lets change value of a and b

　　a = 5

　　b = 20

　　if ( a <= b )

　　then

　　print("Line 5 - a is either less than or equal to b" )

　　end

　　if ( b >= a )

　　then

　　print("Line 6 - b is either greater than or equal to b" )

　　end

　　當建立並執行上面的程序它會產生以下結果：

　　代碼如下:

　　Line 1 - a is not equal to b

　　Line 2 - a is not equal to b

　　Line 3 - a is not less than b

　　Line 4 - a is greater than b

　　Line 5 - a is either less than or equal to b

　　Line 6 - b is either greater than or equal to b