53 lines
		
	
	
		
			1.5 KiB
		
	
	
	
		
			Markdown
		
	
	
	
	
	
			
		
		
	
	
			53 lines
		
	
	
		
			1.5 KiB
		
	
	
	
		
			Markdown
		
	
	
	
	
	
| ---
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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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| 
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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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| 
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| *   **init**语句:在第一次迭代之前执行
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|     
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| *   **条件**表达式:在每次迭代之前计算
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|     
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| *   **post**语句:在每次迭代结束时执行
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|     
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| 
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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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| 
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| `for`循环的一个例子如下 -
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| 
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| **放弃**
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| 
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| ```go
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| package main 
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|  
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|  import "fmt" 
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|  
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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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| 
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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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| 
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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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| 
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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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| 
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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) } \`\`\` |