Use theifstatement to specify a block of JavaScript code to be executed if a condition is true. Syntax if(condition) { //block of code to be executed if the condition is true } Note thatifis in lowercase letters
if( condition ) {//statement}else{//statement (whencondition evaluates tofalse)} 以下流程图说明了 if else 语句。 请参阅以下示例: letx =5;if(x >10) {console.log('x is greater than 10');}else{console.log('x ...
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 (when condition evaluates to false) } 1. 2. 3. 4. 5. 以下流程图说明了 if else 语句。 请参阅...
then a course likeJavaScript made easyfrom udemy will teach you how to define variables as well as how to can use them. Once we have defined the variable we can implement the if statement to reward our boy if his homework is done. The pseudo code ...
if...else if...else 语句- 使用该语句来选择多个代码块之一来执行 switch 语句- 使用该语句来选择多个代码块之一来执行 If 语句 只有当指定条件为 true 时,该语句才会执行代码。 语法 if (条件) { 只有当条件为 true 时执行的代码 } 注意:请使用小写的 if。使用大写字母(IF)会生成 JavaScript 错误! 实例...
问我的"If Else语句“在JavaScript中不起作用(尝试执行等式，如果值为false，则警告用户)EN读牛人技术...
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 ...
if else语句是一种在JavaScript中常用的条件语句,用于根据条件的真假执行不同的代码块。它的基本语法如下: 代码语言:txt 复制 if (条件) { // 如果条件为真,执行这里的代码块 } else { // 如果条件为假,执行这里的代码块 } if else语句的作用是根据条件的真假来决定程序的执行路径。当条件为真时,执行if代...
JavaScript Else If is a type of conditional statement that is used to compare different decisions. Conditional statements let you perform different actions based on varying conditions.JavaScript supports two types of conditional statementsnamely if..else..if and switch. In this tutorial, we will disc...
How does the "else if" statement work? When you use the "else if" statement, the program checks the condition associated with it. If the condition is true, the corresponding block of code is executed. If the condition is false, the program moves on to the next "else if" statement or...