✍ 📁 🙈 🙉 🙊 : 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

<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>

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>

#html Math.random() 隨機數 #script Math.random() 隨機數 #隨機六合彩

✍ 📁 🙈 🙉 🙊

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