erg/doc/zh_CN/syntax/indexes.md

# 指数

[![badge](https://img.shields.io/endpoint.svg?url=https%3A%2F%2Fgezf7g7pd5.execute-api.ap-northeast-1.amazonaws.com%2Fdefault%2Fsource_up_to_date%3Fowner%3Derg-lang%26repos%3Derg%26ref%3Dmain%26path%3Ddoc/EN/syntax/indexes.md%26commit_hash%3D438bcb89ea692f219b30f3a3ba107888b23eae98)](https://gezf7g7pd5.execute-api.ap-northeast-1.amazonaws.com/default/source_up_to_date?owner=erg-lang&repos=erg&ref=main&path=doc/EN/syntax/indexes.md&commit_hash=438bcb89ea692f219b30f3a3ba107888b23eae98)

有关不在此索引中的 API，请参阅 [此处](../API/index.md)。
有关术语，请参见 [此处](../dev_guide/terms.md)。

## 符号

* !
  * !-type → [可变性](./type/mut.md)
* [#](./00_basic.md/#comment)
* $
* %
* &
  * &&
* ′ (single quote)
* ()
* *
  * [*-less multiplication](./01_literal.md/#less-multiplication)
* + (前置)
  * +_ → + (前置)
* + (中置)
* ,
* − (前置)
  * −_ → − (前置)
* − (中置)
  * −>
* . → [可见性]
* /
* :
  * :: → [可见性]
* ;
* <
  * <:
  * <<
  * <=
* =
  * ==
  * =>
* >
  * >>
  * >=
* ?
* @
* []
* \
* ^
  * ^^
* _
  * _+_ → + (infix)
  * _-_ → − (infix)
*``
* {}
  * {} type
* {:}
* {=}
  * {=} type
* |
  * ||
* ~

## 字母

### A

* algebraic type
* And
* and
* assert
* attribute

### B

* Base
* Bool

### C

* Class

### D

* Deprecated
* distinct

### E

* enum type
* Eq
* Erg

### F

* for

### G

### H

### I

* if
* import
* in
* Int

### J

### K

### L

* let-polymorphism → [rank 1 polymorphism]
* log

### M

* match

### N

* Nat
* Never
* None
* None
* Not
* not

### O

* Option
* Or
* or
* Ord

### P

* panic
* [print!](./../API/procs.md#print)
* Python

### Q

### R

* ref
* ref!
* Result
* rootobj

### S

* self
* [Self](./type/special.md)
* [side-effect](./07_side_effect.md)
* Str

### T

* Traits
* True
* Type
* type

### U

### V

### W

* while!

### X

### Y

### Z