hello.go

package main

import "fmt"

func main() {
	fmt.Println("Hello, World!")

	var ch int = '\u0041'
	var ch2 int = '\u03B2'
	var ch3 int = '\U00101234'
	fmt.Printf("%d - %d - %d\n", ch, ch2, ch3) // integer
	fmt.Printf("%c - %c - %c\n", ch, ch2, ch3) // character
	fmt.Printf("%X - %X - %X\n", ch, ch2, ch3) // UTF-8 bytes
	fmt.Printf("%U - %U - %U", ch, ch2, ch3) // UTF-8 code point

	// var x = [5]int{1, 2, 3, 4, 5}
	var x [5]int // 基本类型会自动初始化零值
	xs := x[:]   // 从数组创建一个切片 [引用类型]
	xs[0] = 43   // 修改切片 => 切片底层数据 数组也会被修改

	// Spaces are always added between operands and a newline is appended.
	// 总是在操作数之间添加空格，并追加换行符
	fmt.Println(xs)
	// Spaces are added between operands when neither is a string
	// 当两个字符串都不存在时，在操作数之间添加空格。
	fmt.Print(x)

	// 字符串强制转换为byte 切片
	b := []byte(`{"Name": "Wednesday", "Age": 6, "Parents": ["Gomez", "Morticia"]}`)
	fmt.Print(b)
}