Lua中算术运算符的使用示例

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：

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：

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