course/Concurrency/Concurrency.go

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package main
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import (
"fmt"
"time"
)
func hello() {
fmt.Println("hello")
}
// 主goroutine开启,之后所有的子协程都会自行退出
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func main() {
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//通过匿名函数开启goroutine
for i := 0; i < 10; i++ {
go func() {
fmt.Println(i)
}() //事实上这个函数中的i去找到的是上面这个循环的i所以当goroutine启动过快有可能在一个循环中找到i
}
fmt.Println("this is main,2")
time.Sleep(time.Second)
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}