The if/else statement is a part of JavaScript's "Conditional" Statements, which are used to perform different actions based on different conditions. In JavaScript we have the following conditional statements: Useifto specify a block of code to be executed, if a specified condition is true ...
The if StatementUse the if statement to specify a block of JavaScript code to be executed if a condition is true.Syntaxif (condition) { block of code to be executed if the condition is true } Note that if is in lowercase letters. Uppercase letters (If or IF) will generate a ...
This statement will test whether our boy has his homework done or whether he got any grade other than an “E” for his test. To toggle the condition, it needs to be placed in its own set of brackets. For more programming syntax and advanced JavaScript programming udemy offer aJavaScript f...
if( condition )statement_1statement_2; 如果不使用花括号,将很难看出 statement_2 不属于 if 块。 如果您想在条件计算结果为 false 时执行另一条语句,请按如下方式使用 else: if( condition ) {//statement}else{//statement (...
JavaScript else StatementWe use the else keyword to execute code when the condition specified in the preceding if statement evaluates to false.The syntax of the else statement is:if (condition) { // block of code // execute this if condition is true } else { // block of code // ...
Statement 3 在每次代码块已被执行后增加一个值 (i++)。 语句1 通常我们会使用语句 1 初始化循环中所用的变量 (var i=0)。 语句1 是可选的,也就是说不使用语句 1 也可以。 您可以在语句 1 中初始化任意(或者多个)值: 实例: for (`var i=0,len=cars.length;` i<len; i++) ...
Javascript Programming: If Else + Switch Statement, 视频播放量 4、弹幕量 0、点赞数 0、投硬币枚数 0、收藏人数 0、转发人数 0, 视频作者 张伊不会写代码, 作者简介 ,相关视频:Javascript Programming: Variables,Facilitation Skills - Explain Every Exercise With
Use the else statement to specify a block of code to be executed if the condition is false.SyntaxGet your own Java Server if (condition) { // block of code to be executed if the condition is true } else { // block of code to be executed if the condition is false } ...
问JavaScript：` in / else` `语句是否比中的条件语句更快？EN速度上的差异是可以忽略不计的--使用...
JavaScript var isRaining = true; if (isRaining) { alert("Don't forget an umbrella!"); } As we'll learn later on in this unit, besides a couple of other things, a pair of curly braces ({}) represents a block statement in JavaScript. A block statement is simply a single statement ...