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 ...
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...
Using NOT in the if statement JavaScript also has another logical operator which can be used in the if statement. So far we have tested a condition to see if it is true. But JavaScript has a really simple way of toggling between true and false. By adding an ! to any condition you cha...
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 ...
JavaScript else if StatementWe can use the else if keyword to check for multiple conditions.The syntax of the else if statement is:// check for first condition if (condition1) { // if body } // check for second condition else if (condition2){ // else if body } // if no condition...
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...
在JavaScript中不起作用(尝试执行等式，如果值为false，则警告用户)EN问题:我正在尝试创建一个If Else...
syntax of i f statement is as follows if (condition) { code to be executed; //if conditionis true } The example below shows anif construct. <!-- /* *** Example If else construct .com *** */ vard = (); var time = d.get...
if 语句- 只有当指定条件为 true 时,使用该语句来执行代码 if...else 语句- 当条件为 true 时执行代码,当条件为 false 时执行其他代码 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...