Useful operators

Operators

Operators are symbols that conduct operations. This may include arithmetic, relational, or logical operations. Arithmetic operators would be calculations such as addition, subtraction, multiplication or division.

• They are useful when you need to conduct basic calculations in a game (e.g. Adding XP!)

Logical operators would be statements that indicate if a statement is true or false.

• They are useful when you need to check certain conditions (e.g. Is the player stunned?)

Relational operators would be comparing two variables and return a true or false boolean.

• They are useful when you need to check conditions (e.g. Does the player have enough money to buy this item?)

Arithmetic Operators

-- Operator: Addition (+)
local x = 3 + 2 -- Hence, x = 5.

-- Operator: Subtraction (-)
local x = 3 - 2 -- Hence, x = 1.

-- Operator: Multiplication (*): This is the asterik on your keyboard, usually found at (8) on your keyboard.
local x = 3 * 2 -- Hence, x = 6

-- Operator: Division (/): This is the dash on your keyboard, the same key you use to type (?).
local x = 3 / 2 -- Hence, x = 1.5

-- Operator: Exponentials (^): This is a small triangle that can be found on (6) on your keyboard.
local x = 3 ^ 2 -- Hence, x = 9 as (3 x 3 = 9). This means the same as 3 to the power of 2.

-- Operator: Modulus (%): This is the percentage found on (5), and calculates the remainder of a value.
local x = 3 % 2 -- As 3 can only be divided by 2 once, the remainder would be 1. This would return the value 1.

Relational Operators

-- Operator: Equal to (==): This checks if one value is the same as another value. 
if x == 3 then -- This will run if x is indeed equal to 3.

-- Operator: Not equal to (~=): The curly can be found at the left side of 1, usually.
if x ~= 3 then -- This will run when x is any number but 3.

-- Operator: Greater than (>): 
if x > 3 then -- This will run when x is any number greater than 3.

-- Operator: Smaller than (<):
if x < 3 then -- This will run when x is any number smaller than 3.

-- Operator: Greater than or equal to (>=):
if x >= 3 then -- This will run when x is greater than 3 or if it is indeed 3. 

-- Operator: Less than or equal to (<=):
if x <= 3 then -- This will run when x is smaller than 3 or if it is indeed 3. 

Logical Operators

-- Operator: And (and): This will return a value of 'true' when both conditions are true.
if (x == 3 and y > 4) then -- This will only run if x is 3 and y is any number bigger than 4. If x is 2 but y is any number bigger than 4, it will not run.

-- Operator: Or (or): This will return a value of 'true' when either conditions are true.
if (x == 3 or y > 4) then -- This will run when x is 3 or y is any number bigger than 4. If x is 2 but y is a number bigger than 4, this will still run.

-- Operator: Not (not): This will return a value of 'true' when the condition is false.
if not (x == 3) then -- This will run when x is any number but three. If x is three, this will return as 'false'.