MATLAB 中的 nested 循环函数

MATLAB允许在一个循环中嵌套使用另一个循环。

nested loops - 语法

matlab中嵌套for loop语句的语法如下所示:-

for m=1:j
   for n=1:k
      <statements>;
   end
end

matlab中嵌套的while loop语句的语法如下所示:-

while <expression1>
   while <expression2>
      <statements>
   end
end

nested loops - 示例

让我们使用嵌套的for循环来显示从1到100的所有素数。创建脚本文件并键入以下代码-

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for i=2:100
   for j=2:100
      if(~mod(i,j)) 
         break; % 如果找到因子，则不是素数
      end 
   end
   if(j > (i/j))
      fprintf('%d is prime\n', i);
   end
end

运行文件时，它将显示以下结果-

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