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      检查数字是否有小数位/是否为整数

      时间:2023-09-07
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                本文介绍了检查数字是否有小数位/是否为整数的处理方法,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

                我正在寻找一种在 JavaScript 中检查数字是否有小数位的简单方法(以确定它是否为整数).例如,

                I am looking for an easy way in JavaScript to check if a number has a decimal place in it (in order to determine if it is an integer). For instance,

                23 -> OK
                5 -> OK
                3.5 -> not OK
                34.345 -> not OK
                

                if(number is integer) {...}

                推荐答案

                使用 modulus 会起作用:

                num % 1 != 0
                // 23 % 1 = 0
                // 23.5 % 1 = 0.5
                

                <小时>

                请注意,这是基于数字的数值,与格式无关.它将包含带有固定小数点的整数的数字字符串视为整数:


                Note that this is based on the numerical value of the number, regardless of format. It treats numerical strings containing whole numbers with a fixed decimal point the same as integers:

                '10.0' % 1; // returns 0
                10 % 1; // returns 0
                '10.5' % 1; // returns 0.5
                10.5 % 1; // returns 0.5
                

                这篇关于检查数字是否有小数位/是否为整数的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持html5模板网!

                上一篇:JavaScript 是否支持 64 位整数? 下一篇:x|0 如何对 JavaScript 中的数字进行下限?

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