一、min ≤ r ≤ max
function RandomNumBoth(Min,Max){ ?????var Range = Max - Min; ?????var Rand = Math.random(); ?????var num = Min + Math.round(Rand * Range); //四舍五入 ?????return num;}二、min ≤ r < max
function RandomNum(Min, Max) { ?????var Range = Max - Min; ?????var Rand = Math.random(); ?????var num = Min + Math.floor(Rand * Range); //舍去 ?????return num;}三、min < r ≤ max
function RandomNum(Min, Max) { ?????var Range = Max - Min; ?????var Rand = Math.random(); ?????if(Math.round(Rand * Range)==0){ ??????????????return Min + 1; ?????} ?????var num = Min + Math.round(Rand * Range); ?????return num;}四、min < r < max
function RandomNum(Min, Max) { ?????var Range = Max - Min; ?????var Rand = Math.random(); ?????if(Math.round(Rand * Range)==0){ ???????return Min + 1; ?????}else if(Math.round(Rand * Max)==Max) ?????{ ???????index++; ???????return Max - 1; ?????}else{ ???????var num = Min + Math.round(Rand * Range) - 1; ???????return num; ?????} }js生成指定范围的随机数
原文地址：https://www.cnblogs.com/94pm/p/9666971.html