Lua Learning Notes V (Mathematics Library in Lua)

Math library

Description

Example

Method

Abs

Take the absolute value

math.abs(-15)

15

acos

The anti-cosine function

math.acos(0.5)

1.04719755

asin

The antisine function

math.asin(0.5)

0.52359877

atan2

The reverse cut value of x / y

math.atan2(90.0, 45.0)

1.10714871

atan

Cut the function anyway

math.atan(0.5)

0.463647609

ceil

The maximum integer that is not less than x

math.ceil(5.8)

6

cosh

Double-curve cosine function

math.cosh(0.5)

1.276259652

cos

Cosine function

math.cos(0.5)

0.87758256

deg

Radian angle

math.deg(math.pi)

180

Exp

Calculate the x-square value with e as the base

math.exp(2)

2.718281828

floor

The maximum integer that is not greater than x

math.floor(5.6)

5

fmod （ mod ）

The molding operation

math.mod(14, 5)

4

frexp

Break down the double number val into the numeric part (the last part) and the index n with 2 as the bottom, i.e. val=x*2n

math.frexp(10.0)

0.625 4

ldexp

Calculate the n-side of the value x 2

math.ldexp(10.0, 3)

80 = 10 * (2 ^3)

log10

Calculates a pair of 10-based pairs

math.log10(100)

2

log

Calculate the natural pair of numbers

math.log(2.71)

0.9969

max

Get the maximum value in the argument

math.max(2.71, 100, -98, 23)

100

min

Get the minimum value in the argument

math.min(2.71, 100, -98, 23)

-98

modf

Divide the numbers into integers and numbers

math.modf(15.98)

15 98

pow

Get x's y-side

math.pow(2, 5)

32

Rad

Angle arc

math.rad(180)

3.14159265358

random

Gets the random number

math.random(1, 100) math.random(100)

Get a random number of 1-100

randomseed

Set the random number seed

math.randomseed(os.time())

You must use this function to set the random number seed before you can use the math.random function

sinh

Bi-curved sine function

math.sinh(0.5)

0.5210953

sin

Sine function

math.sin(math.rad(30))

0.5

sqrt

Open square function

math.sqrt(16)

4

tanh

The bi-curved positive-cut function

math.tanh(0.5)

0.46211715

tan

The positive-cut function

math.tan(0.5)

0.5463024