Lua中關係運算子的使用教程
這篇文章主要介紹了Lua中關係運算子的使用教程,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語言支援的關係運算子。假設變數A持有10和變數B持有20則:
樣本
試試下面的例子就明白了所有的Lua程式設計語言提供的關係運算子:
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式它會產生以下結果:
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