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if (condition) { // block of code // execute this if condition is true } else { // block of code // execute this if condition is false }The if...else statement checks the condition and executes code in two ways:If condition is true, the code inside if is executed. And, the ...
8-4.js let insocAlbums = {'first': 'Information Socieity', 'second'': 'Hack', 'thrid': 'Peace and Love Inc.'}; function groupBand(albums){ console.group("Album List"); console.log('first:' , albums.first); console.log('second:' , albums.second); console.log('thrid:' , alb...
functionquote(str,config){const{char='"',skipIfQuoted=true}=config;constlength=str.length;if(skipIfQuoted&&str[0]===char&&str[length-1]===char){returnstr;}returnchar+str+char;}quote('Hello World',{char:'*'});// => '*Hello World*'quote('"Welcome"', { skipIfQuoted: true }); ...
1 JavaScript的组成和书写位置 Javascript:运行在客户端(浏览器)的脚本语言,JavaScript的解释器被称为JavaScript引擎,为浏览器的一部分,与java没有直接的关系。 Java:服务器端的编程语言。 API:Application Programming Inte
Working of JavaScript break Statement The image below shows the working of the break statement in for and while loops. Working of JavaScript break Statement Note: The break statement is usually used inside decision-making statements such as if...else. Example 1: JavaScript break With for Loop...
If...Else StatementBy extending the if statement with an else clause, you can provide an alternative code block to be executed when the condition evaluates to false.Continue Reading...Next > How to use Loops in Javascript Related Topics JavaScript Data Types and Variables Arrays in JavaScript...
Else if Statement Withifandelse, we can run blocks of code depending on whether a condition istrueorfalse. However, sometimes we might have multiple possible conditions and outputs, and need more than simply two options. One way to do this is with theelse ifstatement, which can evaluate mor...
JavaScript includes three forms of if condition: if condition, if else condition and else if condition. The if condition must have conditional expression in brackets () followed by single statement or code block wrapped with . 'else if' statement must be placed after if condition. It can be ...
由于大量使用 with 语句会导致性能下降,同时也会给调试代码造成困难,因此在开发大型应用程序时,不建议使用with语句。 switch 语句 switch 语句与 if 语句的关系最为密切,而且也是在其他语言中普遍使用的一种流控制语句。 switch (expression) { case value: statement break; case value: statement break; case ...