Numbers

Numbers in RuLA represent numeric values, including both integers and decimal numbers.

Creating Numbers

Write numbers directly without quotes:

42          # Integer
-7          # Negative number
3.14159     # Decimal number
0.5         # Decimal less than 1

Number Operations

Arithmetic

5 + 3           # Addition: 8
10 - 4          # Subtraction: 6
3 * 4           # Multiplication: 12
15 / 3          # Division: 5
17 // 5         # Integer division: 3
17 % 5          # Modulo (remainder): 2
2 ** 3          # Exponentiation: 8

Comparison

5 > 3           # Greater than: True
5 >= 5          # Greater than or equal: True
3 < 5           # Less than: True
4 <= 5          # Less than or equal: True

Rounding and Precision

ROUND(3.14159)          # Round to nearest integer: 3
ROUND(3.14159, 2)       # Round to 2 decimals: 3.14
FLOOR(3.7)              # Round down: 3
CEIL(3.2)               # Round up: 4

Absolute Value and Sign

ABS(-5)                 # Returns 5
SIGN(-5)                # Returns -1
SIGN(5)                 # Returns 1
SIGN(0)                 # Returns 0

Useful Number Functions

Function	Description	Example
SUM	Sum of all numbers in a list	SUM([1, 2, 3]) → 6
AVG	Average of numbers in a list	AVG([1, 2, 3]) → 2
MIN	Smallest number in a list	MIN([3, 1, 2]) → 1
MAX	Largest number in a list	MAX([3, 1, 2]) → 3
ROUND	Round to nearest integer	ROUND(2.5) → 3
ROUND(number, decimals)	Round to N decimal places	ROUND(3.14159, 2) → 3.14
FLOOR	Round down to integer	FLOOR(3.9) → 3
CEIL	Round up to integer	CEIL(3.1) → 4
ABS	Absolute value	ABS(-5) → 5
SIGN	Sign of number (-1, 0, 1)	SIGN(-5) → -1
SQRT	Square root	SQRT(16) → 4
CLAMP	Constrain to range	CLAMP(10, 0, 5) → 5
COMB	Combinations (n choose k)	COMB(5, 2) → 10
SUM_PRODUCT	Sum of products	SUM_PRODUCT([1,2], [3,4]) → 11

Working with Lists of Numbers

Aggregate functions work on lists:

numbers = [10, 20, 30, 40]
SUM(numbers)        # 100
AVG(numbers)        # 25
MIN(numbers)        # 10
MAX(numbers)        # 40

Type Checking

To check if a value is a number:

# Numbers are always known (not None/unknown)
known(42)           # True
unknown(42)         # False