Example 1: Simple Program Using switch...case Suppose we want to display a message based on the current day of the week. Let's look at the example below to see how we can achieve this usingswitch...case. letday =3;letactivity;switch(day) {case1:console.log("Sunday");break;case2:...
switch (expression) { case value1: statement1; break; case value2: statement2; break; . . case valueN: statementN; break; default: statementDefault; } 说明: 表达可以是数字或字符串类型。 一式两份案件值是不允许的。 default语句是可选的。如果传递给switch的表达式在任何情况下都不与值匹配, 则...
JavaScript中的switch语句用于根据不同的条件执行不同的代码块。然而,在拆分字符串时,switch语句可能会失败。这是因为switch语句在比较条件时使用的是严格相等运算符(===),而不是松散相等运算符(==)。 当我们尝试使用switch语句来拆分字符串时,它会将字符串与每个case语句中的条件进行严格相等比较。这意味着字符...
正则表达式是一种用于匹配字符串的模式,可以用于搜索、替换等操作。在JavaScript中,可以使用RegExp对象来创建正则表达式。 在JavaScript中,可以使用正则表达式作为switch c...
Example let num = 2; switch(num) { case 1: console.log('one'); break; case 2: console.log('two'); break; case 3: console.log('three'); break; default: console.log('default'); } Run Here Syntax of switch statementThe syntax of the switch statement is as follows:...
Like an example shown above, we can use the switch statement for multiple cases making our work easier. c. Using switch to find the type let a = 5; switch (a) { case 1: a = 5; break; case 5: a = 'five'; break; case 3: a = 'V'; break; case “four”: a = 'FIVE';...
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 code is executed.Example The getDay() method returns the weekday as a number between 0 and 6. (Sunday=0, Monday=1, Tuesday=2 ...
switch(weather){ case 'sunny': //天气非常棒,可以出去玩耍了 break; case 'rainy': //天气下雨了,只能在家里呆着 break; case 'snowing': //天气下雪了,可以出去滑雪了 break; default: //哪里也不出去 } 三元运算符 三元运算符它解决了像if..else块较少的代码。如果你只有两个通过true/false条件选择...
placeType)); switch(this.placeType) { case PlaceType.PASSABLE_TERRAIN: { alert("Case PASSABLE"); break; } case PlaceType.IMPASSABLE_TERRAIN: { alert("Case IMPASSABLE"); break; } case PlaceType.SOMEWHAT_PASSABLE_TERRAIN: { alert("Case SOMEWHAT_PASSABLE"); break; } case PlaceType.PATH: ...
switch(n){ case 1: a = 'number'; break; case '1': a = 'string'; break; default: a = 'default'; break; } console.log(a) } f(1); // number f('1'); // string **如果没有break,程序将不经过任何检查就会继续执行下一个 ***case**: let...