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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 JavaScript switch statement executes different blocks of code based on the value of a given expression. In this tutorial, you will learn about the JavaScript switch statement with the help of examples.
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.
25 lip 2024 · The switch statement evaluates an expression, matching the expression's value against a series of case clauses, and executes statements after the first case clause with a matching value, until a break statement is encountered.
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.
25 kwi 2022 · An example of switch (the executed code is highlighted): let a = 2 + 2; switch (a) { case 3: alert( 'Too small' ); break; case 4: alert( 'Exactly!' ); break; case 5: alert( 'Too big' ); break; default: alert( "I don't know such values" ); }
6 sie 2021 · Using a switch statement can be an alternative to an if else statement. A switch statement compares the value of an expression to multiple cases. switch statements will check for strict equality. In this example, since "2"!== 2, the default clause will execute.
