Operators & Expressions

Operators in Kyna allow you to combine, calculate, compare, and transform values.

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Arithmetic Operators

Operator	Name	Example	Result
+	Addition	10 + 5	15
-	Subtraction	10 - 5	5
*	Multiplication	10 * 5	50
/	Division	10 / 2	5
%	Modulo (Remainder)	10 % 3	1

const subtotal = 100;
const tax = subtotal * 0.08;
const total = subtotal + tax;
print("Total:", total); # 108.0

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String Concatenation

Use + to concatenate strings and scalars:

const service = "auth";
const version = 1;
const path = "/api/v" + version + "/" + service;
print(path); # "/api/v1/auth"

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Comparison Operators

Comparison operators evaluate to a bool (true or false):

Operator	Meaning	Example	Result
==	Equal to	42 == 42	true
!=	Not equal to	42 != 10	true
<	Less than	5 < 10	true
<=	Less than or equal	10 <= 10	true
>	Greater than	15 > 20	false
>=	Greater than or equal	20 >= 20	true

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Logical Operators

Operator	Name	Description
&&	Logical AND	Returns true only if both operands are true
||	Logical OR	Returns true if at least one operand is true
!	Logical NOT	Inverts the truth value of the operand

fn isEligible(age: int, hasPass: bool): bool {
    return age >= 18 && hasPass;
}

print(isEligible(20, true));  # true
print(isEligible(16, true));  # false