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1.JS編寫判斷是否為質數
1 <!doctype html> 2 <html lang="en"> 3 <head> 4 <meta charset="UTF-8"> 5 <title>Document</title> 6 </head> 7 <script type="text/javascript"> 8 var num = 3; 9 flag = true;10 for(var i = 2;i < num - 1;i++){11 if(num%i==0)12 flag = true;13 break;14 }15 16 if(flag){17 alert("是質數");18 }else{ 19 alert("不是質數");20 }21 </script>22 <body>23 24 </body>25 </html>View Code
2.JS計算多個數的和
1 <!doctype html> 2 <html lang="en"> 3 <head> 4 <meta charset="UTF-8"> 5 <title>Document</title> 6 </head> 7 <script type="text/javascript"> 8 var sum = function(){ 9 var result = 0;10 for(var i = 0;i < arguments.length;i++){11 result+=arguments[i];12 }13 return result;14 }15 alert(sum(1,2,3,4,5));16 </script>17 <body>18 19 </body>20 </html>View Code
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