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The JavaScript Switch Statement. Use the switch statement to select one of many code blocks to be executed. Syntax. switch (expression) { case x: // code block. break; case y: // code block. break; default: // code block. } This is how it works: The switch expression is evaluated once.
Use switch to select one of many blocks of code to be executed. This is the perfect solution for long, nested if/else statements. The switch statement evaluates an expression. The value of the expression is then compared with the values of each case in the structure.
Learn how to create a "toggle switch" (on/off button) with CSS. Try it Yourself » How To Create a Toggle Switch. Step 1) Add HTML: Example. <!-- Rectangular switch --> <label class="switch"> <input type="checkbox"> <span class="slider"></span> </label> <!-- Rounded switch --> <label class="switch"> <input type="checkbox">
8 sie 2021 · Use the fall-through feature of the switch statement. A matched case will run until a break (or the end of the switch statement) is found, so you could write it like: switch (varName) { case "afshin": case "saeed": case "larry": alert('Hey'); break; default: alert('Default case'); }
The JavaScript switch statement performs type checking, ensuring both the value and the type of the expression match the case value. For example, let a = 1; switch (a) { case "1": a = "one (string type)"; break; case 1: a = "one (number type)"; break; case 2: a = "two (number type)"; break; default: a = "not found"; } console.log(`The value of ...
6 sie 2021 · Example of Switch Statements in JavaScript. In this example, we are comparing "oboe" to the cases. "oboe" would match the third case clause and would print to the console "I play the oboe". switch ("oboe") { case "trumpet": . console.log("I play the trumpet"); break; case "flute": .
22 sie 2024 · The JavaScript switch statement evaluates an expression and executes a block of code based on matching cases. It provides an alternative to long if-else chains, improving readability and maintainability, especially when handling multiple conditional branches.
