Lua中关系运算符的使用教程
下表列出了所有的lua语言支持的关系运算符。假设变量a持有10和变量b持有20则:
示例
试试下面的例子就明白了所有的lua编程语言提供的关系运算符:
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
当建立并执行上面的程序它会产生以下结果:
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
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