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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.
This document discusses the JavaScript switch case statement. It begins with an introduction explaining that a switch statement evaluates an expression and executes the code for the matching case.
Syntax. The objective of a switch statement is to give an expression to evaluate and several different statements to execute based on the value of the expression. The interpreter checks each case. against the value of the expression until a match is found.
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": .
25 kwi 2022 · A switch statement can replace multiple if checks. It gives a more descriptive way to compare a value with multiple variants. The syntax. The switch has one or more case blocks and an optional default. It looks like this:
The JavaScript switch case is a conditional statement is used to execute different blocks of code depending on the value of an expression. The expression is evaluated, and if it matches the value of one of the case labels, the code block associated with that case is executed.
