Math: Difference between revisions
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>NXTBoy Don't have a top-level heading the same as the page title. |
>Legend26 No Mod operator discussed? wut? |
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* - Unary Negation (e.g., -(20) = -20) | * - Unary Negation (e.g., -(20) = -20) | ||
* ^ Exponentiation (e.g., 5 ^ 5 = 3125) | * ^ Exponentiation (e.g., 5 ^ 5 = 3125) | ||
* % Modulus (Returns the remainder between two numbers e.g. 11 % 3 = 2) | |||
{{Example|<pre> | {{Example|<pre> | ||
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print(8 / 2) --> 4 | print(8 / 2) --> 4 | ||
print(-(20)) --> -20 | print(-(20)) --> -20 | ||
print(23 % 4) --> 3 | |||
</pre>}} | </pre>}} | ||
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+ - | + - | ||
* / | * / % | ||
- (unary) | - (unary) | ||
^ | ^ | ||
Revision as of 19:28, 1 September 2011
Arithmetic Operators
Roblox Lua can do mathematical calculations, much like any calculator. In Lua, there is:
- + Addition (e.g., 2 + 3 = 5)
- - Subtraction (e.g., 5 - 2 = 3)
- * Multiplication (e.g., 5 * 2 = 10)
- / Division (e.g., 8 / 2 = 4)
- - Unary Negation (e.g., -(20) = -20)
- ^ Exponentiation (e.g., 5 ^ 5 = 3125)
- % Modulus (Returns the remainder between two numbers e.g. 11 % 3 = 2)
Example
print(2 + 3) --> 5 print(5 - 2) --> 3 print(5 * 2) --> 10 print(8 / 2) --> 4 print(-(20)) --> -20 print(23 % 4) --> 3
See Also: Mathematic Operators
Parentheses
Parentheses can be used in Lua much as they are used in algebra. If you want something calculated first, put that in parentheses.
Example
print((10 / 20) / 5) -- is equal to .5 / 5, which is .1 print(10 / (20 / 5)) -- is equal to 10 / 4, which is 2.5
Following the associative properties of multiplication and addition, it does not matter how you organize the parentheses in certain instances:
Example
print((10 + 20) + 5) -- is equal to 30 + 5, which is 35 print(10 + (20 + 5)) -- is equal to 10 + 25, which is 35 print((10 * 20) * 5) -- is equal to 200 * 5, which is 1000 print(10 * (20 * 5)) -- is equal to 10 * 100, which is 1000
Precedence
Lua follows the same order of operations as defined by the rules of mathematics. The mnemonic PEMDAS (parentheses, exponents, multiplication, division, addition, and subtraction) apply to Lua. The following goes from lower, to higher priority.
+ -
* / %
- (unary)
^
See Also: Complete Precedence Table
