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@@ -137,5 +137,69 @@
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go version go1.18beta1 darwin/arm64
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--
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+
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+
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+- go语言主要特征
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+
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+ - 首字符可以是任意的Unicode字符或者下划线；剩余字符可以是Unicode字符、下划线、数字
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+
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+- 关键字
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+
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+- ```
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+ break default func interface select
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+ case defer go map struct
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+ chan else goto package switch
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+ const fallthrough if range type
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+ continue for import return var
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+ ```
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+
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+- 保留字
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+
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+- ```shell
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+ Constants: true false iota nil
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+
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+ Types: int int8 int16 int32 int64
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+ uint uint8 uint16 uint32 uint64 uintptr
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+ float32 float64 complex128 complex64
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+ bool byte rune string error
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+
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+ Functions: make len cap new append copy close delete
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+ complex real imag
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+ panic recover
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+ ```
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+
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+- 可见性
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+
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+- ```
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+ 1）声明在函数内部，是函数的本地值，类似private
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+ 2）声明在函数外部，是对当前包可见(包内所有.go文件都可见)的全局值，类似protect
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+ 3）声明在函数外部且首字母大写是所有包可见的全局值,类似public
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+ ```
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+
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+- 声明方式：var（声明变量）, const（声明常量）, type（声明类型） ,func（声明函数）。
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+
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+
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+
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+- 包管理 mod
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+- 编译
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+
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+
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+
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+---
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+
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+- Golang内置类型和函数
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+
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+ - 值类型
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+
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+ - ```
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+ bool
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+ int(32 or 64), int8, int16, int32, int64
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+ uint(32 or 64), uint8(byte), uint16, uint32, uint64
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+ float32, float64
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+ string
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+ complex64, complex128
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+ array -- 固定长度的数组
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+ ```
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+
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+ -
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shadamao