標籤：style title set for 最大 pre 迴圈 個數 doc
迴圈還是很有意思的:
1) 安全數的作業:
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>安全數</title></head><body> <script type="text/javascript"> for(var i = 1;i<=60;i++) { if (i%7!=0 && i%10!=7) { document.write(i+" "); } } </script></body></html>
2) 0.01毫米的紙對摺30次就不得了了:
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>Document</title></head><body> <script type="text/javascript"> var j = 0.01; for(var i = 1;i<=30;i++) { j *= 2; } document.write(j/1000+"米"); /*var j = 0.01; var i = 0; while (j<=1000) { j *= 2;// statement i++ } document.write(i);*/ </script></body></html>
3) 7個數中的最大值和最小值以及對應的下標:
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>哈哈哈哈哈哈</title></head><body> <script type="text/javascript"> var arr = [10,20,35,87,2,14,7]; var max = arr[0]; var min = arr[0]; var maxIndex,minIndex; for(var i = 0; i < 7 ; i++){ if(max < arr[i]) { max = arr[i]; maxIndex = i; } if (min > arr[i]) { min = arr[i]; minIndex = i; } } document.write(max+‘ ‘+maxIndex+"<br>"+min+" "+minIndex); </script></body></html>
JS(一)
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