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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.
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.
function fruitColor(fruit) { switch(fruit) { case "apple" : result = green; break; case "banana" : result = yellow; break; case "kiwi" : result = green; break; case "plum" : result = red; break; } return result; } var result = fruitColor(plum);
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.
Podobnie jak robiłem to w artykule poświęconemu instrukcji warunkowej if, rozpocznę od przedstawienia Ci podstawowej struktury, tym razem instrukcji switch: switch (wyrazenie) { case przypadek1: instrukcjaGdyPrzypadek1 break; case przypadek2: instrukcjaGdyPrzypadek2 break; default: instrukcjaGdyBrakDopasowanegoPrzypadku }
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.
25 lip 2024 · A switch statement allows a program to evaluate an expression and attempt to match the expression's value to a case label. If a match is found, the program executes the associated statement. A switch statement looks like this:
