鍍金池/ 教程/ C/ Lua算術(shù)運(yùn)算符
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Lua算術(shù)運(yùn)算符

下表列出了所有的Lua語言支持的算術(shù)運(yùn)算符。假設(shè)變量A持有10和變量B持有20,則:

運(yùn)算符 描述 示例
+ 兩個(gè)操作數(shù)相加 A + B = 30
- 從所述的第一個(gè)減去第二操作數(shù) A - B = -10
* 兩個(gè)操作數(shù)相乘 A * B = 200
/ 通過分子除以反分子 B / A = 2
% 模運(yùn)算和整數(shù)除法后的余數(shù) B % A = 0
^ 指數(shù)運(yùn)算符需要的指數(shù) A^2 = 100
- 一元運(yùn)算 - 運(yùn)算符相當(dāng)于取反 -A = -10

例子

試試下面的例子就明白了所有的Lua編程語言提供了算術(shù)運(yùn)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 )

當(dāng)執(zhí)行上面的程序,它會(huì)產(chǎn)生以下結(jié)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