# [TUT] Lua Operators

## Recommended Posts Hello everybody Today in this tutorial i will explain to you the arithmetic, relational, and logical operators one by one. it's easy just try to follow my tutorial step by step .

Arithmetic Operators: `+´ , `-´ , `*´ , `/´ , `-´ , `^´
Relational Operators : `<´ , `>´ , `<=´ , `>=´ , `==´ , `~=´
Logical Operators: `and´, `or´, `not´
Misc Operators: `..´, `# Following table shows all the arithmetic operators supported by Lua language.

Description:

 Operator `+´ (addition) : Adds two operands Ex: 1 + 5 = 6 `-´ (subtraction): Subtracts second operand from the first Ex: 10-30 = -20 `*´ (multiplication): Multiply both operands Ex: 5 * 3 = 15 `/´ (division): Divide numerator by de-numerator Ex: 8 / 2 = 4 `^´ (exponentiation): Exponent Operator takes the exponents Ex: 5 ^ 2 = 25

Examples:

```
local W = 5
local M = 10

outputChatBox(W + M) -- Addition: 15
outputChatBox(W - M) -- Subtraction: -5
outputChatBox(W * M) -- Multiplication: 50
outputChatBox(W / M) -- Division: 0.5
outputChatBox(W^2) -- Exponentiation: 25 ``` Relational operators are supplied which return the boolean values true or false.

Description:

 Operator `==´ (equal to) : Example (5 == 6) false `~=´ (not equal to) : Example (5 ~= 6) true `<´ (less than) : Example (5 < 6 ) true `>´ (greater than) : Example (5 > 6 ) false `<=´ (less than or equal to) : Example (5 <= 6 ) true `>=´(greater than or equal to) : Example (5 >= 6 ) false

Example:

```
local W = 5
local M = 10

-- Example 1 : == Equal to
if( W == M ) then
outputChatBox(W.." is equal to "..M )
else
outputChatBox(W.." is not equal to "..M )
end

-- Example 2 : ~= Not equal to
if( W ~= M ) then
outputChatBox(W.." is not equal to "..M )
else
outputChatBox(W.." is equal to "..M )
end

-- Example 3 : < less than
if ( W < M ) then
outputChatBox(W.." is less than "..M )
else
outputChatBox(W.." is not less than "..M )
end

-- Example 4 : Greater than
if ( W > M ) then
outputChatBox(W.." is greater than "..M)
else
outputChatBox(W.." is not greater than "..M )
end

-- Example 5 : <= less than or equal to
if ( W <= M ) then
outputChatBox(W.."is either less than or equal to "..M )
end

-- Example 6 : >= greater than or equal to
if ( M >= W )
outputChatBox(M.." is either greater than  or equal to "..W )
end ```

Note: These also work on strings (alphabetical order) and other types. Following table shows all the logical operators supported by Lua language

Description:

 Operator `and´: (Called Logical AND operator) Example:(true and false) is false `or´: (Called Logical OR Operator) Example:(true or false) is true `not´: (Called Logical NOT Operator) Example: (not true) is false Also there is Miscellaneous operators supported by Lua Language include concatenation and length.

Description:

`..´ : Concatenates two strings.

`#´ : An unary operator that return the length of the a string or a table.

Examples:

```
local W = "Hello"
local M = "Everybody"

-- Example 1 : Concatenates two strings.
outputChatBox(W.." "..M) -- Result: Hello Everybody

-- Example 2:
outputChatBox(#W) -- Result: 5 ```

Edited by Walid
• 2
• 1

Good tutorial, but you should add in the "..." operator too.

Great Job, This topic is really very useful for people who just started scripting.

Good tutorial, but you should add in the "..." operator too.
Great Job, This topic is really very useful for people who just started scripting.

Thx guys.

Awesome TuT, helpful like always @Walid Awesome TuT, helpful like always @Walid Thx hope it helps.

Thx hope it helps.

Yep it does,i will share it with my friends some of them need to learn the LUA operators,im sure this will helps them its clear and understandable to newbies,thanks for your works.

Edited by Guest

Cool work dude !

Can you add the string and math functions as well? I would really be nice.

Cool work dude !

Can you add the string and math functions as well? I would really be nice.

Maybe i will add an other TUT.

thx.

Cool work dude !

Can you add the string and math functions as well? I would really be nice.

Maybe i will add an other TUT.

thx.

Thank you dude

Thank you dude

np.

Good tutorial , keep it up.

Good tutorial , keep it up.

Thank you.

There won't be space between Hello and Everybody on example 1 result.

Yeh bro it's just an example of how to concatenates two strings.

```outputChatBox(W.. "  "..M) -- Result: Hello Everybody.
```

anyways thx.

This topic is really very useful

This topic is really very useful

thx bro

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