下表顯示了Lua語言支持的所有關係運算符。 假設變數A=10，變數B=20，然後 -
| 運算符 | 描述 | 示例 |
|---|---|---|
== |
檢查兩個運算元的值是否相等，如果相等，則條件變為真。 | (A == B)結果為false |
~= |
檢查兩個運算元的值是否相等，如果值不相等則條件變為true。 |
(A ~= B)結果為true |
> |
檢查左運算元的值是否大於右運算元的值，如果是，則條件變為true。 |
(A > B)結果為false |
< |
檢查左運算元的值是否小於右運算元的值，如果是，則條件變為true。 |
(A < B)結果為true |
>= |
檢查左運算元的值是否大於或等於右運算元的值，如果是，則條件變為true。 |
(A >= B)結果為false |
<= |
檢查左運算元的值是否小於或等於右運算元的值，如果是，則條件變為true。 |
(A <= B)結果為true |
示例
嘗試以下示例來瞭解Lua編程語言中可用的所有關係運算符 -
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
當構建並執行上述程式時，它會產生以下結果 -
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