The switch() statement is used in place of a chain of if()…else if()…else if()…else if()…else construct, where such a chain does not lead to very readable, follow-able code. The switch() statement is designed for this situation. Here is the general format: switch(expression or...
The else clause of an if...else statement is associated with the closest previous if statement in the same scope that does not have a corresponding else statement.For this sample to be unambiguous about if...else pairing, uncomment the braces....
“After executing the code inside the switch case that matched, the program exits from the switch statement. Execution doesn’t continue to the next case, so there is no need to explicitly break out of the switch at the end of each case’s code.” 就是说不用在每个case里面再添加break了。
Theswitchstatement evaluates a given Boolean or integer expression and executes the statement(s) associated with thecasesbased on the evaluation of the given expression. It is the best alternative to the lengthyif-else-ifstatements as it reduces the code length and enhances clarity. ...
In addition toif...else, JavaScript has a feature known as aswitchstatement.switchis a type of conditional statement that will evaluate an expression against multiple possible cases and execute one or more blocks of code based on matching cases. Theswitchstatement is closely related to a conditio...
aDeciding whether to use if-then-else statements or a switch statement is based on readability and the expression that the statement is testing. An if-then-else statement can test expressions based on ranges of values or conditions, whereas a switch statement tests expressions based only on a ...
switch{ case{ [ statements-1 ] } case{ [ statements-2 ] } case { [ statements-3 ] } } Aswitchstatement causes the server to evaluateexpansion, which can be an&Attribute-Nameordata. The result is compared againstmatch-1andmatch-2to find a match. If no string matches, then the serve...
The switch statement takes an integer and executes the corresponding set of statements. switch(/*Integer value*/) { case 0: //commands break; case 1: //commands break; ... } The switch statement takes an integer value or a command returning an integer value as a parameter. It then ju...
The functions ifelse() and switch() execute flow control at the console or within a function or script. The ifelse() function evaluates a logical expression and chooses one of two values based on the result. The switch() function takes a value as an argument and returns another value ...
C语言提供了多种分支语句,包括if语句、if-else语句和switch语句。if语句是最基本的分支语句之一,它允许在给定条件为真时执行一段代码。if语句的语法如下:```if (condition){ // code block to be executed if the condition is true}```这里,`condition`是一个布尔表达式,如果它的值为真(非零),则会执行...