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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.
23 sie 2013 · break tells javascript to stop evaluating cases in the switch block. Code execution continues past the closing switch bracket. The return statement in the example code will indeed prevent further of anything past it, including other case statements and anything following the switch block.
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.
Jeżeli zabraknie słowa kluczowego break, to program nie "wyskoczy" z danej instrukcji case i będzie się wykonywał tak długo, aż trafi na innego break'a lub jeśli nie będzie go wcale, to wykona wszystkie kolejne przypadki. Możesz zobaczyć to na przykładzie: switch (number) {. case 1:
8 gru 2022 · Na przykład, jeśli chcemy wyświetlić komunikat „Kciuk dla JavaScript” tylko wtedy, gdy zmienna x ma wartość true, to możemy użyć instrukcji warunkowej switch…case w następujący sposób: switch (x) { case true: console.log("Kciuk dla JavaScript"); break; }
The break keyword breaks out of the switch block. This will stop the execution of more execution of code and/or case testing inside the block. If break is omitted, the next code block in the switch statement is executed. The default keyword specifies some code to run if there is no case match. There can only be one default keyword in a switch.
The break statement breaks out of a switch or a loop. In a switch, it breaks out of the switch block. This stops the execution of more code inside the switch. In in a loop, it breaks out of the loop and continues executing the code after the loop (if any).
