JavaScript Switch statement is used to execute different set of statements based on different conditions. It is similar to If-Else statement, but excels in code simplicity and works greatly with numbers, characters and Strings. Syntax </> Copy switch(expression){ case value_1 : // set of st...
Java is strongly typed language and variable must be declare first to use in program.In Java the type of a variable is checked at compile-time. JavaScript is weakly typed language and have more relaxed syntax and rules. Java is an object oriented programming language. JavaScript is an object ...
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In this section, we shall see one of the most common conditional statements in JavaScript and programming, in general — the if statement. The if statement executes code if a given condition is true. Here's the syntax of an if statement: if (expression) statement; We start with the if ...
The JavaScript Switch StatementUse the switch statement to select one of many blocks of code to be executed.Syntaxswitch(expression) { case n: code block break; case n: code block break; default: default code block } This is how it works:The switch expression is evaluated once. The value...
JavaScript reference Statements and declarations switch Theswitchstatementevaluates anexpression, matching the expression's value to acaseclause, and executesstatementsassociated with that case. Syntax switch (expression) { case value1: //Statements executed when the result of expression matches value1 [...
syntax error: unexpected else, expecting } 3.多分支控制 基本语法如下: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 if 条件表达式1 { 执行代码块1 } else if 条件表达式2 { 执行代码块2 } ... else { 执行代码块n } 说明: 先判断条件表达式1是否成立,如果为True,就执行代码块1 如果条件表...
Let’s make a working example of aswitchstatement following the syntax above. In this code block, we will find the current day of the week with thenew Date()method, andgetDay()to print a number corresponding to the current day.0stands for Sunday, all the way through6which stands for ...
Switch outperforms fancy syntax. Performance wise switch is unsurprisingly faster than the mapping version. You can do some sampling with the following snippet, just replace the version of authReducer with the mapping version after testing switch: console.time("sample");for (let i = 0; i < ...
Syntax of the switch...case Statement switch(expression) {casevalue1:// code block to be executed// if expression matches value1break;casevalue2:// code block to be executed// if expression matches value2break; ... default:// code block to be executed// if expression doesn't match any...