JS switch case 语句与 if else 语句的多分支结构类似,都可以根据不同的条件来执行不同的代码;但是与 if else 多分支结构相比,switch case 语句更加简洁和紧凑,执行效率更高。 JavaScript switch case 语句的语法格式如下: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 switch(表达式){ casevalue1: statements1...
JavaScript Switch...Case StatementsIn this tutorial you will learn how to use the switch...case statement to test or evaluate an expression with different values in JavaScript.Using the Switch...Case StatementThe switch..case statement is an alternative to the if...else if...else statement,...
At times there might be cases wherein you have to evaluate multiple cases to match with the result of the expression given as input. At that time, the use of switch statements is preferable as it gives more readability and also reduces the amount of code that has to be written. Also whe...
Switch case and if-else offer two different approaches to writing conditional statements in JavaScript. Here’s how to determine which one to use.
JavaScript Switch Case Default Thedefaultstatement is executed if the switch expression output does not match with any of the given cases. In the below example we have shown this scenario: With this, we have covered the JavaScript switch statement. Althoughifelsestatements are popular and used in...
The JavaScript switch...case statement executes different blocks of code based on the value of a given expression. Here's a simple example of the switch...case statement. You can read the rest of the tutorial for more. Example let trafficLight = "green"; let message = "" switch (...
Cases1,2,3,4, and5are listed sequentially without individual code blocks. When the variabledaymatches any of these cases, the code block immediately following the cases is executed. Notice that there is no need for explicitbreakstatements between these cases, allowing the control to flow through...
JavaScript switch case 语句的语法格式如下: switch (表达式){ case value1: statements1 // 当表达式的结果等于 value1 时,则执行该代码 break; case value2: statements2 // 当表达式的结果等于 value2 时,则执行该代码 break; ... case valueN: statement...
switchstatement, a type ofconditonal statementwhich evaluates an expression and outputs different values based on matching results. We reviewedswitchstatements using a range and multiplecasestatements. . JavaScript is a high-level, object-based, dynamic scripting language popular as a tool for making ...
When JavaScript reaches abreakkeyword, it breaks out of the switch block. This will stop the execution inside the switch block. It is not necessary to break the last case in a switch block. The block breaks (ends) there anyway. Note:If you omit the break statement, the next case will ...