<Go - 嵌套循环>

Go 编程语言允许在一个循环内部使用另一个循环。以下部分会展示几个示例来说明该概念 −

<语法>

<嵌套循环>Go 中语句的语法如下 −

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

<示例>

以下程序使用嵌套循环来查找 2 到 100 之间的素数 −

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);
      }
   }  
}

当编译并执行上述代码时，会生成以下结果 −

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