Over the next few sections, we will touch on the the following conditional statements in JavaScript: “if“, “if...else“, “if...else if“, “if...else if...else“. You Might Also Like JavaScript JavaScript Logical Operators 7 min readRead More → JavaScript Using a for Loop in...
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.
There are several sections of the bash man page that provide further detail on the topicscovered in this chapter: bash 手册页中有几部分对本章中涵盖的主题提供了更详细的内容: Lists ( 讨论控制操作符 || 和&& ) Compound Commands ( 讨论 [[ ]], (( )) 和if ) CONDITIONAL EXPRESSIONS (条件...
In JavaScript we have the following conditional statements: Useifto specify a block of code to be executed, if a specified condition is true Useelseto specify a block of code to be executed, if the same condition is false Useelse ifto specify a new condition to test, if the first condit...
Learn the basics of the JavaScript `if` conditionalAn if statement is used to make the program take a route, or another, depending on the result of an expression evaluation.This is the simplest example, which always executes:if (true) { //do something }...
javascript条件JavaScript条件判断 JavaScript使用if () { ... } else { ... }来进行条件判断。例如,根据年龄显示不同内容,可以用if语句实现如下:var age = 20; if (age >= 18) { // 如果age >= 18为true,则执行if语句块 alert('adult'); } else { // 否则执行else语句块 alert('teenage ...
There are several conditional statements in JavaScript that you can use to make decisions:The if statement The if...else statement The if...else if...else statement The switch...case statementWe will discuss each of these statements in detail in the coming sections.The...
The switch conditional The for loop The while loop Introduction Perhaps, one of the most paramount aspects of modern-day programming is that of control flow. This chapter is devoted briefly exploring the different kinds of control flow constructs in JavaScript. But before that, let's quickly unde...
Below is a segment of JavaScript code that will be executed only if the If Statement's conditional statement is true. In this simpleIf Statementexample, we print out a message if the variable we are checking is equal to 7. JavaScript Code: ...
EN1. 条件语句的介绍 条件语句就是通过条件来控制程序的走向 2. 条件语句语法 if 语句 - 只有当...