JavaScript switch case语句在我们之前的文章中,我们已经学习了如何在JavaScript中使用if-else语句进行决策。我们已经看到,我们可以使用if-else语句基于特定条件执行某些任务,如果条件为真,执行任务A,如果条件为假,执行任务B。在JavaScript中,switch case语句也用于决策目的。在某些情况下,使用switch case语句比if-else语句...
Example 1: Simple Program Using switch...case Suppose we want to display a message based on the current day of the week. Let's look at the example below to see how we can achieve this usingswitch...case. letday =3;letactivity;switch(day) {case1:console.log("Sunday");break;case2:...
it evaluates the first case in the list of cases written in the code to the result of the expression given as an input. The associated code of the case that gets matched continues to execute. It continues to evaluate all the cases until the case gets matched with the result of the...
在JavaScript中,Switch Case语句能否使用正则表达式? JavaScript的Switch Case语句支持正则表达式匹配吗? 正则表达式是一种用于匹配字符串的模式,可以用于搜索、替换等操作。在JavaScript中,可以使用RegExp对象来创建正则表达式。 在JavaScript中,可以使用正则表达式作为switch case的条件,以下是一个示例代码: ...
Switch case and if-else offer two different approaches to writing conditional statements in JavaScript. Here’s how to determine which one to use.
确保你不会忘记break块末尾的语句,如果你不放一个break结尾的声明case块,JavaScript 将失败到下一个case. consthero='Batman';letsidekick;switch(hero){case'Batman':sidekick='Robin';// Unless there's a `break`, JavaScript will execute the next// `case` block.// break;case'Aquaman':sidekick='Aqu...
如何使用switch语句javascript创建函数 我现在开始学习JS,我需要用switch语句做下面的练习。 function colorMix (color1, color2){ if ((color1 === 'red' && color2 === 'blue') || (color1 === 'blue' && color2 === 'red')){ return 'violet';...
Example switch(newDate().getDay()) { default: text ="Looking forward to the Weekend"; break; case6: text ="Today is Saturday"; break; case0: text ="Today is Sunday"; } Try it Yourself » Ifdefaultis not the last case in the switch block, remember to end the default case with...
Switch case calculator in JavaScript - Let’s say, we are required to write a JavaScript function that takes in a string like these to create a calculator −4 add 6 6 divide 7 23 modulo 8Basically, the idea is that the string will contain two numbers o
case 1: echo "i equals 1"; break; case 2: echo "i equals 2"; break; } // 相当于: if ($i == 0) { echo "i equals 0"; } elseif ($i == 1) { echo "i equals 1"; } elseif ($i == 2) { echo "i equals 2"; ...