Operators

This page describes all operators available in Felico.

Arithmetic Operators

+ Addition

let x = 5 + 3  // 8

- Subtraction

let x = 10 - 3  // 7

* Multiplication

let x = 4 * 5  // 20

/ Division

let x = 15 / 3  // 5

% Modulo (Remainder)

let x = 10 % 3  // 1

- Unary Negation

let x = -5  // -5

Comparison Operators

== Equal

let result = 5 == 5  // true

!= Not Equal

let result = 5 != 3  // true

< Less Than

let result = 3 < 5  // true

<= Less Than or Equal

let result = 5 <= 5  // true

> Greater Than

let result = 10 > 5  // true

>= Greater Than or Equal

let result = 5 >= 5  // true

Logical Operators

&& Logical AND

let result = true && false  // false

Short-circuits: the right side is not evaluated if the left side is false.

|| Logical OR

let result = true || false  // true

Short-circuits: the right side is not evaluated if the left side is true.

! Logical NOT

let result = !true  // false

Assignment Operators

= Assignment

let x = 42
x = 10

Operator Precedence

From highest to lowest precedence:

String Concatenation

The + operator works with strings:

let greeting = "Hello, " + "World!"  // "Hello, World!"

Future Operators

Planned operators for future versions:

• +=, -=, *=, /= - Compound assignment
• ++, -- - Increment, decrement (maybe)
• ?. - Optional chaining
• ?? - Null coalescing
• |> - Pipeline operator (maybe)
• .., ..= - Range operators

Operator Overloading

(Future feature: Custom types will be able to define operator behavior)