Attributes and methods in math library

ceil： Rounding up ——math.ceil(n)

floor： Rounding down ——math.floor(n)

fmod： Remainder   —— The sign of the remainder is the same as that of the dividend ——math.fmod(m,n)

modf： return x The integral and fractional parts of , Two parts of the numerical symbols and x identical , The integer part is represented as a floating point ——math.modf(n)

 pow： To the power —— The result is floating point —— math.pow(m,n)

sqrt： square root —— The result is floating point ——math.sqrt(n)

isqrt： Round down the square root to the nearest integer —— The result is an integer ——math.isqrt(n)

fabs： Take the absolute value —— The result is floating point ——math.fabs(n)       《==》     abs(n)  Take the absolute value —— The result is type and   n  The same type of

        

e： constants   attribute ——math.e

pi：  PI   attribute ——math.pi

nan:(not a number)——nan Property is a special value that represents a non numeric value . This property indicates that a value is not a number , In mathematical representation, a number that cannot be represented , There is usually another expression here inf,inf and nan The difference is ,inf Is a floating-point number that exceeds the range of floating-point representation ( Its essence is still a number , It's just that he's infinite , Therefore, floating point numbers cannot be used to represent , such as 1/0), and nan It generally represents a non floating point number ( For example, irrational numbers ).nan and nan The comparison relation of is math.nan != math.nan

isnan： Judge whether it's a number , If n yes nan（ Not numbers ）, Then return to True , Otherwise return to False .——math.isnan(n)

inf: infinity (infinity Abbreviation ), Represents the maximum range of floating-point numbers （ Or more than double Maximum of type ）. for example , When used 0 Divide by an integer and you get a 1.#INF / inf value ; Corresponding , If you use 0 Divide by a negative integer and you will get -1.#INF / -inf value .  

Indicates positive and negative infinity ：    float("inf"), float("-inf")

inequality ： When it comes to > and < Operation time , All the numbers are equal to -inf Big ; All the numbers are equal to +inf Small ;

equation ： +inf and +inf equal ;-inf and -inf equal

isfinite： Judge whether it is infinite ——math.isfinite(n) ,math.isfinite(n) Method can determine parameters n The numerical . If n Neither infinity nor nan, Then return to True , Otherwise return to False

sin： sine ——math.sin(n)

cos： cosine ——math.cos(n)

tan： tangent ——math.tan(n) square root
 

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