if (condition) { //Code be run when the condition is truthy } Example of Writing an if Statement in JavaScript Let us write a short script to show you how the if statement works within JavaScript. In this script, we will get the current day of the week and use a conditional statement...
When you write code, you will often need to use conditional statements, such as "if" statements. Here's an explanation of the JavaScript If statement.A conditional statement refers to a piece of code that does one thing based on one condition, and another based on another condition. In ...
Here, we have three conditions inside theifstatement. The first condition is a combination of two conditions in itself. In order for the first condition to betruethe inner two conditionsnum != 20andnum%2 == 0must also be true since there is an&&operator. Then we have the second conditio...
In all the programming languages I’ve come across, the If statement is extensively used for this purpose.It’s actually quite simple to use the if statement and here is the format of an if statement. if (condition) { statements to execute } When JavaScript encounters an if statement, ...
Use theelse ifstatement to specify a new condition if the first condition is false. Syntax if(condition1) { //block of code to be executed if condition1 is true }elseif(condition2) { //block of code to be executed if the condition1 is false and condition2 is true ...
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 (1)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 (condition) { 当条件为 true 时执行的代码 } 请
[else if (condition_n_1) { statement_n_1; }] [else { statement_n; }] 要执行多个语句,可以使用语句块({ ... }) 来分组这些语句。一般情况下,总是使用语句块是一个好的习惯,特别是在代码涉及比较多的 if 语句时: if (条件) { 当条件为真的时候,执行语句1; ...
This JavaScript tutorial explains how to use the if-else statement with syntax and examples. In JavaScript, the if-else statement is used to execute code when a condition is TRUE, or execute different code if the condition evaluates to FALSE.
8.2 If the function body consists of a single statement returning an expression without side effects, omit the braces and use the implicit return. Otherwise, keep the braces and use a return statement. eslint: arrow-parens, arrow-body-style Why? Syntactic sugar. It reads well when multiple ...
StatementDescription breakBreaks out of a loop continueSkips a value in a loop whileLoops a code block while a condition is true do...whileLoops a code block once, and then while a condition is true forLoops a code block while a condition is true ...