They are mathematical functions that come with the development environment, and their names are related abbreviations. Just know how to use them.

+

increase

-

negative

*

Diverse

/

Except for ...

%

Find the remainder

& lt

absent

& lt=

less than or equal to

& gt

Bigger than ...

& gt=

greater than or equal to

==

be qualified for sth

! =

unequal to

& amp& amp

and

||

or

!

Say "no"

：

situation

Function in

Acrylonitrile-butadiene-styrene

absolute value

sqrt

square root

bang

(A and B)

Find the b power of a

It's all in these books. Look it up yourself! ~~~~~