Operators
Arithmetic Operators
Arithmetic operators are used to perform mathematical calculations.
| Operator | Description |
|---|---|
+ | Addition |
- | Subtraction |
* | Multiplication |
/ | Floating-point division |
// | Floor division |
% | Modulus (remainder) |
^ | Exponentiation |
& | Bitwise AND |
| ` | ` |
~ | Bitwise XOR |
<< | Bitwise left shift |
>> | Bitwise right shift |
Example:
a = 20
b = 5
print(a + b) -- Prints the result of a + b: 25
print(a - b) -- Prints the result of a - b: 15
print(a * b) -- Prints the result of a * b: 100
print(a / b) -- Prints the result of a / b: 4
print(a // b) -- Prints the result of a // b (floor division): 4
print(a % b) -- Prints the result of a % b (modulus): 0
print(a ^ b) -- Prints the result of a raised to the power of b: 3200000
print(a & b) -- Prints the result of bitwise AND: 4
print(a | b) -- Prints the result of bitwise OR: 21
print(a ~ b) -- Prints the result of bitwise XOR: 17
print(a << b) -- Prints the result of a left shifted by b: 640
print(a >> b) -- Prints the result of a right shifted by b: 0
Relational Operators
Relational operators are used to compare two values.
| Operator | Description |
|---|---|
== | Equal to |
~= | Not equal to |
<= | Less than or equal to |
>= | Greater than or equal to |
< | Less than |
> | Greater than |
Example:
a = 20
b = 5
print(a == b) -- Prints the comparison result: false
print(a ~= b) -- Prints the comparison result: true
print(a <= b) -- Prints the comparison result: false
print(a >= b) -- Prints the comparison result: true
print(a < b) -- Prints the comparison result: false
print(a > b) -- Prints the comparison result: true
Logical Operators
Logical operators are used to perform logical operations on boolean values.
| Operator | Description |
|---|---|
and | Logical AND; returns true if both sides are true, otherwise false. |
or | Logical OR; returns true if at least one side is true. |
not | Logical NOT; reverses the boolean value. |
Example:
a = true
b = false
print(a and b) -- true AND false results in false
print(a or b) -- true OR false results in true
print(20 > 5 and not true) -- true AND NOT true, which results in false
These operators enable various forms of computation and logical reasoning in Lua scripts, providing the foundation for more complex programming logic.