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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.
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Use switch to select one of many blocks of code to be...
- Switch
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.
The switch statement evaluates an expression, compares its results with case values, and executes the statement associated with the matching case value. The following illustrates the syntax of the switch statement: switch (expression) {. case value1: statement1; break; case value2: statement2; break;
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'); } edited May 29, 2021 at 4:29.
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.
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.
25 kwi 2022 · For example: let a = "1"; let b = 0; switch (+ a) { case b + 1: alert("this runs, because +a is 1, exactly equals b+1"); break; default: alert("this doesn't run"); } Here +a gives 1, that’s compared with b + 1 in case, and the corresponding code is executed.
