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1337735459

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【函数】判断一个数是否是素数(又叫质数，只能被1和自身整数的数)

2022-10-21 16:10:11 查看(94) 回复(0)

<!DOCTYPE html> <html lang="en"> <head>  <meta charset="UTF-8">  <title>Title</title>  <script>  function f(x){ let s=0  for (i=1;i<=x;i++){ if (x%i==0){
          s=s+1  }
      } if (s==2){ return "素数"  }

	} v=f(21);  document.write(v) </script> </head> <body>  </body> </html>