Switch Case Javascript Mdn

If multiple cases matches a case value the first case is selected. Statements executed when the result of expression matches value1 break case value2. Syntax switch expression case value1.

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Switch case javascript mdn. Javascript switch case. 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. Instrukcja switch ocenia wyrażenie dopasowując wartość wyrażenia do klauzuli case i wykonuje instrukcje powiązane z tym case a także instrukcje w przypadkach następujących po dopasowanym przypadku. For example let s consider.

The switch statement evaluates an expression matching the expression s value to a case clause and executes statements associated with that case. Switch new date getday case 1. The switch statement evaluates an expression matching the expression s value to a case clause and executes statements associated with that case as well as statements in cases that follow the matching case. The program first looks for a case clause with a label matching the value of expression and then transfers control to that clause executing the associated statements.

Note that in this example the cases share the same code block and that the default case does not have to be the last case in a switch block however if default is not the last case in the switch block remember to end it with a break. Here the execution of case 3 starts from the line and goes through case 5 because there s no break. Console log default 掉到下面 case 1.

The values must be of the same type to match. Se múltiplos casos corresponderem o valor o primeiro caso que corresponder é selecionado mesmo se os casos não forem iguais entre si. The following flow chart explains a switch case statement works.

You can use multiple if. If no default label is found the program continues to the statement s after the switch. Let s emphasize that the equality check is always strict. If no matching cases are found the program continues to the default label.

Javascript switch statement. Se a condição for correspondida o programa executa as instruções asssociadas. Javascript evaluates the above switch statement as follows. Statements executed the result of expression matches value2 break.

The ability to group cases is a side effect of how switch case works without break.