switch(expression) { casex: // code block break; casey: // code block break; default: //code block } This is how it works: The switch expression is evaluated once. The value of the expression is compared with the values of each case. ...
default: //this code will execute if none of the cases match the expression break; } 计算机将检查switch语句,并检查case和expression之间是否严格等同===。如果其中一个案例与expression匹配,则该案case句中的代码将执行。 switch (expression) { case 1: //this code will execute if the case matches th...
switch(expression) { case n: code block break; case n: code block break; default: default code block }参数值参数描述 expression 必需。指定要计算的表达式。表达式会被计算一次。表达式的值与结构中每个 case 标签的值进行比较。如果匹配,则执行相关的代码块。
switch(expression) { case n: code block break; case n: code block break; default: default code block } This is how it works:The switch expression is evaluated once. The value of the expression is compared with the values of each case. If there is a match, the associated block of ...
In other words when a match is found, and the job is done, if the break statement is encountered. Otherwise the switch statement will continue evaluating the expression. You should be aware that the first match will be the statement that is executed. If you would like multiple matches to ...
1switch(expression) {2casex: {3/* Your code here */4break;5}6casey: {7/* Your code here */8break;9}10default: {11/* Your code here */12}13} 很好,现在有一些你可能不知道需要注意的事情: 可选的关键字 break break 关键字允许我们在满足条件时停止执行块。如果不将 break 关键字添加到 ...
JS switch语句是一种条件语句,用于根据不同的条件执行不同的代码块。它遵循以下模式: 代码语言:txt 复制 switch (expression) { case value1: // 当expression等于value1时执行的代码块 break; case value2: // 当expression等于value2时执行的代码块 break; case value3: // 当expression等于value3时执行的代...
它就像if-else-if语句一样。...语法: switch(expression){ case value1: //code to be executed; break; //optional case value2: //code to...语句落空通过所有case语句下面我们来看看java switch语句落空通过所有条件,即 case 子句中的所有条件都未能匹配。...也就是如果不在 switch case 下使用break...
1switch (expression) { 2 case x: { 3 /* Your code here */ 4 break; 5 } 6 case y: { 7 /* Your code here */ 8 break; 9 } 10 default: { 11 /* Your code here */ 12 } 13} 1. 2. 3. 4. 5. 6. 7. 8. 9. ...
switchcase 语句判断一个变量与一系列值中某个值是否相等,每个值称为一个分支。switchcase 语句语法格式如下:switch(expression){ case value1 : //语句 break; //可选 case value2 : //语句 break; //可选 //你可以有任意数量的ca Java switch语句 ...