


Javascript implements a numerical addition function_javascript skills
No further nonsense, just give me the code
JS
<script type="text/javascript"> function Sum(arg1,arg2){ //数值加法函数 var sarg1 = new String(arg1); //将传入的参数转为字符串以便进行参数检查 var sarg2 = new String(arg2); //将参数2转为字符类型 if( (sarg1=="")||(sarg2=="") ) //确保参数不为空 { var e0 = new Error(); //当有参数为空则抛出异常 e0.Serial = 1000001; //错误编号 if( sarg1=="" ) //根据为空的参数正确填写错误信息 { e0.message = "Sum函数参数非法:第1个参数为空!"; //错误描述信息 } else { e0.message = "Sum函数参数非法:第2个参数为空!"; } throw e0; //抛出错误信息 } for(i=0;i<sarg1.length;i++){ //参数合法性检查 for(j=0;j<10;j++){ //检查所有字符 if(sarg1.charAt(i)==j) //若不是数字则抛出错误信息 { break; //跳出循环 } else { if(j==9) //当已经查询到数字9时 { var e1 = new Error(); //错误信息对象 e1.Serial = 1000001; //错误编号 e1.message = "Sum函数参数:" + sarg1 + "是非法数字!"; //错误描述信息 throw e1; } } } } for( k=0;k<sarg2.length;k++ ) //检查参数2是数字 { for(l=0;l<10;l++){ //从0到9逐一比较 if(sarg2.charAt(k)==l) //如果是0~9的数字 { break; } else { if(l==9) //只有包含非数字则抛出错误信息 { var e2 = new Error(); //创建错误对象 e2.Serial = 1000001; //异常编号 e2.message = "Sum函数参数:" + sarg2 + "是非法数字!"; throw e2; } } } } return Number(arg1) + Number(arg2); //参数都正确则返回两个值得和 } function Button1_onclick(){ //“计算”按钮的单机事件处理程序 try{ var Text1 = document.getElementById("Text1"); var Text2 = document.getElementById("Text2"); var Text3 = document.getElementById("Text3"); var sum = Sum(Text1.value,Text2.value); //调用函数进行计算 Text3.value = sum; //输出计算结果 } catch(e){ //有错误发生则输出错误信息 alert(e.message); //输出异常中的信息 if(e.Serail == 1000001) //如果是1000001号错误 { alert(e.message); e = null; } } } </script>
HTML:
<input type="text" id="Text1" style="width:84px" maxlength="20"/> + <input type="text" id="Text2" style="width:75px" maxlength="20"/> = <input type="text" id="Text3" style="width:69px"> <input type="button" id="Button1" value="计算" onclick="return Button1_onclick()" />
The above is the entire content of this article, I hope you all like it.

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics

How to use WebSocket and JavaScript to implement an online speech recognition system Introduction: With the continuous development of technology, speech recognition technology has become an important part of the field of artificial intelligence. The online speech recognition system based on WebSocket and JavaScript has the characteristics of low latency, real-time and cross-platform, and has become a widely used solution. This article will introduce how to use WebSocket and JavaScript to implement an online speech recognition system.

WebSocket and JavaScript: Key technologies for realizing real-time monitoring systems Introduction: With the rapid development of Internet technology, real-time monitoring systems have been widely used in various fields. One of the key technologies to achieve real-time monitoring is the combination of WebSocket and JavaScript. This article will introduce the application of WebSocket and JavaScript in real-time monitoring systems, give code examples, and explain their implementation principles in detail. 1. WebSocket technology

How to use WebSocket and JavaScript to implement an online reservation system. In today's digital era, more and more businesses and services need to provide online reservation functions. It is crucial to implement an efficient and real-time online reservation system. This article will introduce how to use WebSocket and JavaScript to implement an online reservation system, and provide specific code examples. 1. What is WebSocket? WebSocket is a full-duplex method on a single TCP connection.

Introduction to how to use JavaScript and WebSocket to implement a real-time online ordering system: With the popularity of the Internet and the advancement of technology, more and more restaurants have begun to provide online ordering services. In order to implement a real-time online ordering system, we can use JavaScript and WebSocket technology. WebSocket is a full-duplex communication protocol based on the TCP protocol, which can realize real-time two-way communication between the client and the server. In the real-time online ordering system, when the user selects dishes and places an order

JavaScript tutorial: How to get HTTP status code, specific code examples are required. Preface: In web development, data interaction with the server is often involved. When communicating with the server, we often need to obtain the returned HTTP status code to determine whether the operation is successful, and perform corresponding processing based on different status codes. This article will teach you how to use JavaScript to obtain HTTP status codes and provide some practical code examples. Using XMLHttpRequest

JavaScript and WebSocket: Building an efficient real-time weather forecast system Introduction: Today, the accuracy of weather forecasts is of great significance to daily life and decision-making. As technology develops, we can provide more accurate and reliable weather forecasts by obtaining weather data in real time. In this article, we will learn how to use JavaScript and WebSocket technology to build an efficient real-time weather forecast system. This article will demonstrate the implementation process through specific code examples. We

Introduction to the method of obtaining HTTP status code in JavaScript: In front-end development, we often need to deal with the interaction with the back-end interface, and HTTP status code is a very important part of it. Understanding and obtaining HTTP status codes helps us better handle the data returned by the interface. This article will introduce how to use JavaScript to obtain HTTP status codes and provide specific code examples. 1. What is HTTP status code? HTTP status code means that when the browser initiates a request to the server, the service

Usage: In JavaScript, the insertBefore() method is used to insert a new node in the DOM tree. This method requires two parameters: the new node to be inserted and the reference node (that is, the node where the new node will be inserted).
