Go語言巢狀for迴圈

Go程式設計語言允許在另一個迴圈內使用一個迴圈。 以下部分顯示了幾個例子來說明這個概念。

語法

Go程式設計語言中的巢狀for迴圈的語法是：

for [condition |  ( init; condition; increment ) | Range]
{
   for [condition |  ( init; condition; increment ) | Range]
   {
      statement(s);
   }
   statement(s);
}

範例

以下程式使用巢狀for迴圈來從2到100中查詢素數：

package main

import "fmt"

func main() {
   /* local variable definition */
   var i, j int

   for i=2; i < 100; i++ {
      for j=2; j <= (i/j); j++ {
         if(i%j==0) {
            break; // if factor found, not prime
         }
      }
      if(j > (i/j)) {
         fmt.Printf("%d is prime\n", i);
      }
   }  
}

當上述程式碼編譯和執行時，它產生以下結果：

2 is prime
3 is prime
5 is prime
7 is prime
11 is prime
13 is prime
17 is prime
19 is prime
23 is prime
29 is prime
31 is prime
37 is prime
41 is prime
43 is prime
47 is prime
53 is prime
59 is prime
61 is prime
67 is prime
71 is prime
73 is prime
79 is prime
83 is prime
89 is prime
97 is prime