本文介绍了如何在javascript中生成1到20之间的5个随机数的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
大家好 我正在编写代码,我需要从给定范围生成5个数字(此处介于1到20之间)。 我可以生成一个随机数,如下所示并在循环中运行上面的代码生成5次,这是正确的方法吗? 另外我有时会在最后5个数字中得到相同的数字。 提前致谢。 我尝试过:
Hi Everyone I am working on a code where I need to generate 5 numbers from a given range (here between 1 to 20). I could generate one random number as shown below and run the above code in a loop to generate 5 times, is this the right way? Also I sometimes end up getting same numbers in the final 5 numbers. Thanks in advance. What I have tried:
<script type="text/javascript"> $(document).ready(function () { $('#div').html(Math.floor(Math.random() * 6) + 1); var arr = []; for (var i = 0; i < 5; i++) { arr.push(Math.floor(Math.random() * 6) + 1) } console.log(arr); }); </script>推荐答案
( document )。ready( function (){ (document).ready(function () {
(' #div')。html( Math .floor( Math .random( )* 6 )+ 1 ); var arr = []; for ( var i = 0 ; i< 5 ; i ++) { arr.push ( Math .floor( Math .random()* 6 )+ 1 )} console .log(arr ); }) ; < / script> ('#div').html(Math.floor(Math.random() * 6) + 1); var arr = []; for (var i = 0; i < 5; i++) { arr.push(Math.floor(Math.random() * 6) + 1) } console.log(arr); }); </script>
以下代码提取 1..20 范围内的五个数字,重复。 The following code extracts five numbers in the 1..20 range, without repetitions. var a = [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20]; var n; var r=[]; for (n=1; n<=5; ++n) { var i = Math.floor((Math.random() * (20-n)) + 1); r.push(a[i]); a[i] = a[20-n]; }
您可以尝试此处 [ ^ ]。 此算法描述如下:从甲板上随机抽取5张卡片[ ^ ]。
You might try it here[^]. The algorithm is described here: Random extraction of 5 cards from a deck[^].
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如何在javascript中生成1到20之间的5个随机数
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