Operators

Minilux supports various operators for arithmetic, comparison, and logical operations.

Arithmetic Operators

Perform mathematical operations on integers:

Operator	Description	Example
+	Addition	$result = 5 + 3 → 8
-	Subtraction	$result = 10 - 4 → 6
*	Multiplication	$result = 6 * 7 → 42
/	Division	$result = 20 / 4 → 5
%	Modulo	$result = 17 % 5 → 2

Examples

$a = 10
$b = 3

$sum = $a + $b          # 13
$diff = $a - $b         # 7
$product = $a * $b      # 30
$quotient = $a / $b     # 3
$remainder = $a % $b    # 1

# Using parentheses for precedence
$result = (10 + 5) * 2  # 30
$calc = 1 + (4 / 2)     # 3

Comparison Operators

Compare values and return true (1) or false (0):

Operator	Description	Example
==	Equal to	$a == $b
!=	Not equal to	$a != $b
>	Greater than	$a > $b
<	Less than	$a < $b
>=	Greater than or equal	$a >= $b
<=	Less than or equal	$a <= $b

Examples

$age = 25

if ($age >= 18) {
    printf("You are an adult")
}

if ($age < 65) {
    printf("Not a senior citizen")
}

if ($age == 25) {
    printf("You are exactly 25")
}

Logical Operators

Combine boolean conditions:

Operator	Alternative	Description	Example
AND	&&	Logical AND	($a > 0) AND ($b > 0)
OR	`		`

Important: Double Parentheses Required

When using AND or OR operators, you must use double parentheses:

# ✅ CORRECT - Double parentheses
if (($age >= 18) AND ($age <= 65)) {
    printf("Working age")
}

if (($score < 60) OR ($grade == "F")) {
    printf("Need to improve")
}

# ❌ WRONG - Single parentheses will cause parse errors
if ($age >= 18 AND $age <= 65) {
    # This won't work!
}

Combining Conditions

$age = 25
$hasLicense = 1
$hasInsurance = 1

# Multiple AND conditions
if ((($age >= 18) AND ($hasLicense == 1)) AND ($hasInsurance == 1)) {
    printf("You can drive!")
}

# Mixing AND and OR
if ((($age < 18) OR ($age > 65)) AND ($hasDiscount == 1)) {
    printf("Special discount available")
}

Simple Conditions

Simple conditions without logical operators use single parentheses:

if ($age >= 18) {
    printf("Adult")
}

if ($score > 90) {
    printf("Excellent!")
}

Operator Precedence

Operations are evaluated in this order (highest to lowest):

1. Parentheses ()
2. Multiplication *, Division /, Modulo %
3. Addition +, Subtraction -
4. Comparison ==, !=, <, >, <=, >=
5. Logical AND, OR

Examples

$result = 10 + 5 * 2        # 20, not 30 (* has higher precedence)
$result = (10 + 5) * 2      # 30 (parentheses override precedence)

$x = 5
$y = 10
if (($x > 0) AND ($y < 20)) {
    # Both conditions evaluated, then AND applied
    printf("Both conditions are true")
}