下表列出了所有的Lua语言支持的算术运算符。假设变量A持有10和变量B持有20，则：

 例子

试试下面的例子就明白了所有的Lua编程语言提供了算术运算符：

复制代码 代码如下:a = 21
b = 10
c = a + b
print("Line 1 - Value of c is ", c )
c = a - b
print("Line 2 - Value of c is ", c )
c = a * b
print("Line 3 - Value of c is ", c )
c = a / b
print("Line 4 - Value of c is ", c )
c = a % b
print("Line 5 - Value of c is ", c )
c = a^2
print("Line 6 - Value of c is ", c )
c = -a
print("Line 7 - Value of c is ", c )

当执行上面的程序，它会产生以下结果：

复制代码 代码如下:Line 1 - Value of c is  31
Line 2 - Value of c is  11
Line 3 - Value of c is  210
Line 4 - Value of c is  2.1
Line 5 - Value of c is  1
Line 6 - Value of c is  441
Line 7 - Value of c is  -21