53 lines
1.5 KiB
Markdown
53 lines
1.5 KiB
Markdown
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---
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title: Loops
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localeTitle: 循环
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---
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# 对于Go中的循环
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Go只`for`循环。基本`for`循环有三个组件分隔`;` -
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* **init**语句:在第一次迭代之前执行
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* **条件**表达式:在每次迭代之前计算
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* **post**语句:在每次迭代结束时执行
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**init**语句通常是一个简短的变量声明。在那里声明的变量只在`for`语句的范围内可见。一旦布尔条件求值为false,循环就会停止迭代。
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`for`循环的一个例子如下 -
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**放弃**
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```go
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package main
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import "fmt"
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func main() {
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sum := 0
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for i := 0; i <= 10; i++ {
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sum += i
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}
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fmt.Println("The sum of first 10 natural numbers is", sum)
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}
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```
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运行上述程序会产生类似于以下输出的输出 - \`\`\`
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$ go run for.go 前10个自然数之和为55
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```
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You can use `continue` and `break` to adjust the loops flow
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```
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走 //此代码打印最多5个奇数 对于n:= 0; n <= 10; n ++ { 如果n%2 == 0 { //如果数字甚至跳到下一个n 继续 } fmt.Println(n)的 //如果数字是5,则退出循环 如果n == 5 { 打破 } }
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```
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If you want to create an infinite loop just use `for { }`
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```
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走 for { // Whill循环直到条件破坏循环 break //退出循环 }
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```
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## Replacement for while-loop
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To simulate while-loop of other languages, you can simply exclude the **init** and **post** statement:
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```
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走 func main(){ num:= 1 for num <= 1000 { num \* = 2 } fmt.Println(“1000以上2的最小功率”,num) } \`\`\`
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