Math.random() 偽隨機數

函數返回一個浮點, 偽隨機數在範圍從0到小於1

<style>#Random {font-size:20px;width:100%} #Random td{font-size:20px;padding:6px} </style> <table id="Random" border="1" ><tbody><tr><th width="55%">函數</th><th width="20%">範圍</th><th width="25%">隨機數</th><tr><td> Math.random()</td><td>random 0 to 1</td><td id="Ra1">第一行 欄位 2 <tr><td> Math.floor(Math.random()*10)</td><td>random 0 to 9</td><td id="Ra2"><tr><td> Math.floor(Math.random()*10+1)</td><td> random 1 to 10</td><td id="Ra3"><tr><td> Math.floor(Math.random()*100)</td><td> random 0 to 99</td><td id="Ra4"><tr><td> Math.floor(Math.random()*100+1)</td><td> random 1 to 100</td><td id="Ra5"><tr><td> var min=20, max=80<br> Math.floor(Math.random() * (max - min + 1) ) + min; </td><td> random 20 to 80</td><td id="Ra6"> </td></tr></tbody></table> <script>var qid ; function Ram(){ clearTimeout ( qid );Math.floor Ra1.innerHTML = Math.random(); Ra2.innerHTML = Math.floor(Math.random()*10); Ra3.innerHTML = Math.floor(Math.random()*10+1); Ra4.innerHTML = Math.floor(Math.random()*100); Ra5.innerHTML = Math.floor(Math.random()*100+1); var min=20, max=80 ; Ra6.innerHTML=Math.floor(Math.random() * (max - min + 1) ) + min; qid = setTimeout ( Ram, 1000 ); } Ram(); </script>

00

<style>ss {float:left;font-size:30px;margin-right:11px} gg {font-size:20px;height:30px;width:30px;border: 2px solid black; border-radius:30px; display: flex;justify-content: center;align-items: center;float:left;margin-right:11px} </style> <ss> 六合彩 </ss> <div id="DP"></div><button type="button" onclick="RamA()">下一組</button> <script>function RamA(){ var n = 0; var status =""; for(i=0;i<=5;i++){ n = Math.floor(Math.random()*49+1); if(status.indexOf(n)>=0){ i-=1;continue; } else{ status += n + ' '; }; }; var res = status.split(" "); res.sort(function(a, b){return a-b} ); var DDP = ""; DDP += '<gg>' + res[1] + '</gg>' DDP += '<gg>' + res[2] + '</gg>' DDP += '<gg>' + res[3] + '</gg>' DDP += '<gg>' + res[4] + '</gg>' DDP += '<gg>' + res[5] + '</gg>' DDP += '<gg>' + res[6] + '</gg>' DP.innerHTML = DDP; } RamA(); </script>

00

#html Math.random() 隨機數#script Math.random() 隨機數#隨機 六合彩