本篇文章主要介紹 Go 程式語言的基本語法

  • 變數
  • 陣列
  • 運算符號
  • if condition
  • for loop
  • for each
  • function
  • map
  • struct

變數

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var a int
var b float64
var c string
var d rune
var e bool

陣列

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var a int[]
var a int[] = []int{}
var a int[] = []int{1, 2, 3}

運算符號 (同 C++)

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a == b
a != b
a > b
a >= b
a < b
a <= b
!a
a && b
a || b

if condition

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if a > b {
    ...
} else if a < b {
    ...
} else {
    ...
}

for loop

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for i := 0; i < 10; i++ {
    ...
}

for each

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for index, element := range array {
    ...
}

function

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func Calculate() {
    ...
}

func Calculate(a int) {
    ...
}

func Calculate(a int) int {
    ...
    return 0
}

map

宣告

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var valueByKey = make(map[string]int)

取值和檢查存在

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value, isExisted := valueByKey[key]

賦值

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valueByKey[key] = value

struct

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type Person struct {
    Name    string
    Age     int
}

var p Person = Person{
    Name: "John"
    Age: 28
}