Module math: Mathematical Functions

• math.abs
• math.acos
• math.asin
• math.atan
• math.ceil
• math.cos
• math.exp
• math.floor
• math.isinf
• math.isnan
• math.log
• math.pow
• math.random
• math.round
• math.sin
• math.sqrt
• math.tan
• math.trunc
• Constants

math.abs

Returns the absolute value of x.

math.acos

Returns the arcus cosine (in radians) of x.

Throws ErrArgument if abs(x) > 1.

math.asin

Returns the arcus sine (in radians) of x.

Throws ErrArgument if abs(x) > 1.

math.atan

Returns the arcus tangent (in radians) of x.

math.ceil

Returns the smallest integer greater than or equal to x.

print math.ceil(3) → 3 print math.ceil(3.4) → 4 print math.ceil(-3.4) → -3

math.cos

Returns the cosine of x (in radians).

math.exp

Returns e^x

math.floor

Returns the largest integer less than or equal to x.

print math.floor(3) → 3 print math.floor(3.4) → 3 print math.floor(-3.4) → -4

math.isinf

Returns true if x is (positive or negative) infinity, false otherwise.

math.isnan

Returns true if x is not-a-number, false otherwise.

math.log

Returns the natural logarithm of x.

math.pow

Returns x^y.

Throws ErrArgument if x < 0 and y is not an integer.

Throws ErrOverflow if x = 0 and y < 0.

print math.pow(2, 0.5) → 1.4142135624 print math.pow(-5, 3); → -125

math.random

Returns a random number uniformely distributed in the interval 0 (inclusive) to 1 (exclusive). With an argument, initializes the sequence of random numbers with seed. seed can be any number.

The default initialization is based on the current time.

math.random(0); for i=1 to 3 do   print math.random() end → 0.0038488093 0.6952766137 0.2338878537

math.round

Rounds x to decimals decimal digits.

print math.round(4.5) → 5 print math.round(math.pi, 4) → 3.1416

math.sin

Returns the cosine of x (in radians).

math.sqrt

Returns the square root of x.

Throws ErrArgument if x < 0.

math.tan

Returns the tangent of x (in radians).

math.trunc

Returns the integral part of x.

print math.trunc(3) → 3 print math.trunc(3.4) → 3 print math.trunc(-3.4) → -3

math Constants

• const inf = Inf (positive) "infinity".

• const nan = NaN "not-a-number".

• const pi = 3.141592653589793 π.