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| | + | == Mathematical Operators == |
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Revision as of 12:24, 21 August 2014
Lua operators are expressions used to perform calculations or to pass arguments between different value types.
Conditional Operators
| if |
Query if something does or does not meet a certain condition.
|
| else |
Do something else if the query condition was not met.
|
| elseif |
Used to add additional if queries, if the initial query condition was not met.
|
| end |
This is used to close various queries or functions; there must be the same amount of end as if; except in instances where elseif has been used.
|
| Example 1: if condition is true (method 1) |
|
local a = true
if a then
print("a = true")
end |
|
| Example 2: if condition is true (method 2) |
|
local a = true
if a == true then
print("a = true")
end |
|
| Example 3: if condition is false |
|
local a = false
if a == false then
print("a = false")
end |
|
| Example 4: if condition is not met, then do else |
|
local a = false
if a then
print("a = true")
else
print("a = false")
end |
|
| Example 5: if condition is not met, then do elseif |
|
local a = false
if a then
print("a = true")
elseif not a then
print("a = false")
end |
|
Logical Operators
| and |
Allows you to check multiple conditions in a single if query.
|
| or |
Allows you to add an alternative if query into a single if query.
|
| not |
Checks if condition equals false or negative.
|
| Example 1: if condition a is true and condition b is false then |
|
local a = true
local b = false
if a == true and b == false then
print("a = true", "b=false")
end |
|
| Example 2: if condition is true or condition == true then |
|
local a = true
if a or a == true then
print("a = true")
end |
|
| Example 3: if condition is not true |
|
local a = false
if not a then
print("a = false")
end |
|
Comparison Operators
| == |
Equal to.
|
| ~= |
Does not equal.
|
| >= |
Greater than or equal to.
|
| > |
Greater than.
|
| <= |
Less than or equal to.
|
| < |
Less than.
|
| Example 1: if a equals 1 |
|
local a = 1
if a == 1 then
print("a = 1")
end |
|
| Example 2: if a does not equal 2 |
|
local a = 1
if a ~= 2 then
print("a = " .. a)
end |
|
| Example 3: if a is greater than or equal to 2 |
|
local a = 5
if a >= 2 then
print("a = " .. a)
end |
|
| Example 4: if a is greater than 2 |
|
local a = 3
if a > 2 then
print("a = " .. a)
end |
|
| Example 5: if a less than or equal to 2 |
|
local a = 2
if a <= 2 then
print("a = " .. a)
end |
|
| Example 6: if a less than 2 |
|
local a = 0
if a < 2 then
print("a = " .. a)
end |
|
Mathematical Operators
| + |
Add
|
| - |
Subtract or invert
|
| * |
Multiply
|
| / |
Divide
|
| ^ |
Power
|
| % |
Remainder
|
