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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.
The switch statement executes a block of code depending on different cases. The switch statement is a part of JavaScript's "Conditional" Statements, which are used to perform different actions based on different conditions. Use switch to select one of many blocks of code to be executed.
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...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 (trafficLight) { case "red": message = "Stop immediately.";
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.
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": .
9 kwi 2021 · The JavaScript switch keyword is used to create multiple conditional statements, allowing you to execute different code blocks based on different conditions. The code below shows you a switch statement in action: var score = 20; switch(age){ case 10: console.log("Score value is 10"); break; case 20:
