Math

The Math module provides comprehensive mathematical operations, constants, and utility functions for Soul. It includes basic arithmetic operations, trigonometric functions, logarithmic functions, statistical operations, and random number generation capabilities.

Mathematical Constants

The Math module provides commonly used mathematical constants:

PI - Circle constant π

The ratio of a circle’s circumference to its diameter:

radius = 5
circumference = 2 * Math.PI * radius
println(circumference)  // 31.415926535897932

E - Euler’s number

The base of natural logarithms:

naturalLog = Math.log(Math.E)
println(naturalLog)     // 1

TAU - Circle constant τ

The ratio of a circle’s circumference to its radius (2π):

radius = 5
circumference = Math.TAU * radius
println(circumference)  // 31.415926535897932

EPSILON - Machine epsilon

The smallest representable positive number:

println(Math.EPSILON)   // 2.2204460492503130808472633361816E-16

Basic Mathematical Operations

abs - Absolute value

Returns the absolute value of a number:

positive = Math.abs(5)
negative = Math.abs(-5)
zero = Math.abs(0)

println(positive)  // 5
println(negative)  // 5
println(zero)      // 0

sign - Sign of number

Returns the sign of a number (-1, 0, or 1):

positive = Math.sign(42)
negative = Math.sign(-42)
zero = Math.sign(0)

println(positive)  // 1
println(negative)  // -1
println(zero)      // 0

max - Maximum value

Returns the largest of two or more numbers:

maximum = Math.max(5, 10, 3, 8)
println(maximum)   // 10

// With negative numbers
maximum = Math.max(-5, -10, -3)
println(maximum)   // -3

min - Minimum value

Returns the smallest of two or more numbers:

minimum = Math.min(5, 10, 3, 8)
println(minimum)   // 3

// With negative numbers
minimum = Math.min(-5, -10, -3)
println(minimum)   // -10

clamp - Clamp value between bounds

Restricts a value to be within a specified range:

// Clamp to range [0, 10]
result1 = Math.clamp(15, 0, 10)  // 10 (clamped to max)
result2 = Math.clamp(-5, 0, 10)  // 0 (clamped to min)
result3 = Math.clamp(5, 0, 10)   // 5 (within range)

println(result1)  // 10
println(result2)  // 0
println(result3)  // 5

Rounding Operations

ceil - Round up

Returns the smallest integer greater than or equal to a number:

rounded = Math.ceil(4.3)
println(rounded)    // 5

rounded = Math.ceil(-4.3)
println(rounded)    // -4

floor - Round down

Returns the largest integer less than or equal to a number:

rounded = Math.floor(4.7)
println(rounded)    // 4

rounded = Math.floor(-4.7)
println(rounded)    // -5

round - Round to nearest integer

Returns the nearest integer, rounding half away from zero:

rounded = Math.round(4.5)
println(rounded)    // 5

rounded = Math.round(4.4)
println(rounded)    // 4

rounded = Math.round(-4.5)
println(rounded)    // -5

Power and Root Operations

pow - Power function

Returns base raised to the power of exponent:

result = Math.pow(2, 3)
println(result)     // 8

result = Math.pow(9, 0.5)
println(result)     // 3 (square root)

result = Math.pow(2, -2)
println(result)     // 0.25

sqrt - Square root

Returns the square root of a number:

result = Math.sqrt(9)
println(result)     // 3

result = Math.sqrt(2)
println(result)     // 1.4142135623730951

// Note: sqrt of negative numbers returns null
result = Math.sqrt(-9)
println(result)     // null

Logarithmic and Exponential Functions

log - Natural logarithm

Returns the natural logarithm (base e) of a number:

result = Math.log(Math.E)
println(result)     // 1

result = Math.log(10)
println(result)     // 2.302585092994046

// Note: log of zero or negative numbers returns null
result = Math.log(0)
println(result)     // null

exp - Exponential function

Returns e raised to the power of a number:

result = Math.exp(1)
println(result)     // 2.718281828459045 (Math.E)

result = Math.exp(0)
println(result)     // 1

result = Math.exp(2)
println(result)     // 7.38905609893065

Trigonometric Functions

sin - Sine function

Returns the sine of an angle (in radians):

result = Math.sin(0)
println(result)     // 0

result = Math.sin(Math.PI / 2)
println(result)     // 1

result = Math.sin(Math.PI)
println(result)     // 0 (approximately)

cos - Cosine function

Returns the cosine of an angle (in radians):

result = Math.cos(0)
println(result)     // 1

result = Math.cos(Math.PI / 2)
println(result)     // 0 (approximately)

result = Math.cos(Math.PI)
println(result)     // -1

tan - Tangent function

Returns the tangent of an angle (in radians):

result = Math.tan(0)
println(result)     // 0

result = Math.tan(Math.PI / 4)
println(result)     // 1 (approximately)

result = Math.tan(Math.PI)
println(result)     // 0 (approximately)

Modulo Operations

mod - Modulo operation

Returns the floating-point remainder of x divided by y:

result = Math.mod(10, 3)
println(result)     // 1

result = Math.mod(10.5, 3)
println(result)     // 1.5

result = Math.mod(-10, 3)
println(result)     // -1

// Note: mod by zero returns null
result = Math.mod(10, 0)
println(result)     // null

Number Testing Functions

isPositive - Check if positive

Tests if a number is positive:

result = Math.isPositive(5)
println(result)     // true

result = Math.isPositive(-5)
println(result)     // false

result = Math.isPositive(0)
println(result)     // false

isNegative - Check if negative

Tests if a number is negative:

result = Math.isNegative(-5)
println(result)     // true

result = Math.isNegative(5)
println(result)     // false

result = Math.isNegative(0)
println(result)     // false

isZero - Check if zero

Tests if a number is zero:

result = Math.isZero(0)
println(result)     // true

result = Math.isZero(0.0)
println(result)     // true

result = Math.isZero(1)
println(result)     // false

Random Number Generation

random - Generate random number

Generates a random number between 0 and 1 (exclusive):

// Random number between 0 and 1
randomNum = Math.random()
println(randomNum)  // e.g., 0.7234567890123456

// Random number between 0 and max
randomNum = Math.random(10)
println(randomNum)  // e.g., 7.234567890123456

// Random number between min and max
randomNum = Math.random(5, 15)
println(randomNum)  // e.g., 12.234567890123456

seed - Set random seed

Sets the seed for the random number generator:

// Set a specific seed for reproducible results
Math.seed(12345)
random1 = Math.random()
random2 = Math.random()

// Reset with same seed - will produce same sequence
Math.seed(12345)
random3 = Math.random()
random4 = Math.random()

println(random1 == random3)  // true
println(random2 == random4)  // true

// Access current seed
currentSeed = Math.seed
println(currentSeed)  // 12345

Practical Examples

Distance Calculation

soul distance(x1, y1, x2, y2) {
    dx = x2 - x1
    dy = y2 - y1
    return Math.sqrt(dx * dx + dy * dy)
}

// Calculate distance between two points
dist = distance(0, 0, 3, 4)
println(dist)  // 5

Angle Conversions

soul degreesToRadians(degrees) {
    return degrees * Math.PI / 180
}

soul radiansToDegrees(radians) {
    return radians * 180 / Math.PI
}

// Convert 45 degrees to radians
radians = degreesToRadians(45)
println(radians)  // 0.7853981633974483

// Convert back to degrees
degrees = radiansToDegrees(radians)
println(degrees)  // 45

Statistical Calculations

soul standardDeviation(values) {
    n = Array.length(values)
    if (n == 0) return 0
    
    // Calculate mean
    mean = Array.sum(values) / n
    
    // Calculate variance
    variance = Array.reduce(values, soul(acc, x) {
        diff = x - mean
        return acc + diff * diff
    }, 0) / n
    
    return Math.sqrt(variance)
}

numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
stdDev = standardDeviation(numbers)
println(stdDev)  // 2.8722813232690143

Geometric Calculations

soul circleArea(radius) {
    return Math.PI * radius * radius
}

soul sphereVolume(radius) {
    return (4/3) * Math.PI * Math.pow(radius, 3)
}

// Calculate area of a circle with radius 5
area = circleArea(5)
println(area)  // 78.53981633974483

// Calculate volume of a sphere with radius 3
volume = sphereVolume(3)
println(volume)  // 113.09733552923255

Random Number Utilities

soul randomInt(min, max) {
    return Math.floor(Math.random(min, max + 1))
}

soul randomChoice(array) {
    index = randomInt(0, Array.length(array) - 1)
    return Array.get(array, index)
}

soul shuffle(array) {
    result = Array.copy(array)
    for (i = Array.length(result) - 1; i > 0; i--) {
        j = randomInt(0, i)
        // Swap elements
        temp = Array.get(result, i)
        Array.set(result, i, Array.get(result, j))
        Array.set(result, j, temp)
    }
    return result
}

// Generate random integer between 1 and 10
randomNum = randomInt(1, 10)
println(randomNum)

// Choose random element from array
colors = ["red", "green", "blue", "yellow"]
randomColor = randomChoice(colors)
println(randomColor)

// Shuffle array
shuffled = shuffle([1, 2, 3, 4, 5])
println(shuffled)

Trigonometric Applications

soul polarToCartesian(r, theta) {
    x = r * Math.cos(theta)
    y = r * Math.sin(theta)
    return {x: x, y: y}
}

soul cartesianToPolar(x, y) {
    r = Math.sqrt(x * x + y * y)
    theta = Math.atan2(y, x)  // Note: atan2 not implemented, using approximation
    return {r: r, theta: theta}
}

// Convert polar coordinates to cartesian
point = polarToCartesian(5, Math.PI / 4)
println(point)  // {x: 3.5355339059327378, y: 3.5355339059327378}

Financial Calculations

soul compoundInterest(principal, rate, time, compound) {
    return principal * Math.pow(1 + rate / compound, compound * time)
}

soul simpleInterest(principal, rate, time) {
    return principal * (1 + rate * time)
}

// Calculate compound interest
// $1000 at 5% annually for 10 years, compounded quarterly
amount = compoundInterest(1000, 0.05, 10, 4)
println(amount)  // 1643.61947

// Calculate simple interest
amount = simpleInterest(1000, 0.05, 10)
println(amount)  // 1500

Best Practices

Handle edge cases: Always check for invalid inputs (negative numbers for sqrt, zero for division)
Use appropriate precision: Be aware of floating-point precision limitations
Choose the right function: Use appropriate mathematical functions for your use case
Angle units: Remember that trigonometric functions use radians, not degrees
Random seeding: Set seeds for reproducible random sequences when needed

// Good - handle edge cases
soul safeDivision(a, b) {
    if (Math.isZero(b)) {
        return null  // or throw error
    }
    return a / b
}

// Good - use constants
circumference = 2 * Math.PI * radius  // Use Math.PI instead of 3.14159

// Good - convert degrees to radians
angleInRadians = angleInDegrees * Math.PI / 180
sineValue = Math.sin(angleInRadians)

// Good - set seed for reproducible results
Math.seed(42)
randomSequence = [Math.random(), Math.random(), Math.random()]

// Good - clamp values to valid ranges
normalizedValue = Math.clamp(inputValue, 0, 1)

The Math module provides a comprehensive set of mathematical functions and constants for Soul, enabling complex mathematical computations, statistical analysis, and geometric calculations with precision and reliability.

CLI Usage

Modules

Syntaxes

​Math

​Mathematical Constants

​PI - Circle constant π

​E - Euler’s number

​TAU - Circle constant τ

​EPSILON - Machine epsilon

​Basic Mathematical Operations

​abs - Absolute value

​sign - Sign of number

​max - Maximum value

​min - Minimum value

​clamp - Clamp value between bounds

​Rounding Operations

​ceil - Round up

​floor - Round down

​round - Round to nearest integer

​Power and Root Operations

​pow - Power function

​sqrt - Square root

​Logarithmic and Exponential Functions

​log - Natural logarithm

​exp - Exponential function

​Trigonometric Functions

​sin - Sine function

​cos - Cosine function

​tan - Tangent function

​Modulo Operations

​mod - Modulo operation

​Number Testing Functions

​isPositive - Check if positive

​isNegative - Check if negative

​isZero - Check if zero

​Random Number Generation

​random - Generate random number

​seed - Set random seed

​Practical Examples

​Distance Calculation

​Angle Conversions

​Statistical Calculations

​Geometric Calculations

​Random Number Utilities

​Trigonometric Applications

​Financial Calculations

​Best Practices