2.5 KiB
2.5 KiB
id | title | challengeType | videoUrl | forumTopicId | dashedName |
---|---|---|---|---|---|
56533eb9ac21ba0edf2244df | 在 Switch 语句添加多个相同选项 | 1 | https://scrimba.com/c/cdBKWCV | 18242 | multiple-identical-options-in-switch-statements |
--description--
如果你忘了给 switch
的每一条 case
添加 break
,那么后续的 case
会一直执行,直到遇见 break
为止。 如果你想为 switch
中的多个不同的输入设置相同的结果,可以这样写:
let result = "";
switch (val) {
case 1:
case 2:
case 3:
result = "1, 2, or 3";
break;
case 4:
result = "4 alone";
}
这样,1、2、3 都会有相同的结果。
--instructions--
请写一个 switch 语句,按如下条件设置 answer
:
1-3
- Low
4-6
- Mid
7-9
- High
提示: 你的 case
应写全范围中的每一个数字。
--hints--
sequentialSizes(1)
应该返回字符串 Low
assert(sequentialSizes(1) === 'Low');
sequentialSizes(2)
应该返回字符串 Low
assert(sequentialSizes(2) === 'Low');
sequentialSizes(3)
应该返回字符串 Low
assert(sequentialSizes(3) === 'Low');
sequentialSizes(4)
应该返回字符串 Mid
assert(sequentialSizes(4) === 'Mid');
sequentialSizes(5)
应该返回字符串 Mid
assert(sequentialSizes(5) === 'Mid');
sequentialSizes(6)
应该返回字符串 Mid
assert(sequentialSizes(6) === 'Mid');
sequentialSizes(7)
应该返回字符串 High
assert(sequentialSizes(7) === 'High');
sequentialSizes(8)
应该返回字符串 High
assert(sequentialSizes(8) === 'High');
sequentialSizes(9)
应该返回字符串 High
assert(sequentialSizes(9) === 'High');
你不应使用 if
或 else
语句。
assert(!/else/g.test(code) || !/if/g.test(code));
你应该编写 9 个case
语句。
assert(code.match(/case/g).length === 9);
--seed--
--seed-contents--
function sequentialSizes(val) {
let answer = "";
// Only change code below this line
// Only change code above this line
return answer;
}
sequentialSizes(1);
--solutions--
function sequentialSizes(val) {
let answer = "";
switch (val) {
case 1:
case 2:
case 3:
answer = "Low";
break;
case 4:
case 5:
case 6:
answer = "Mid";
break;
case 7:
case 8:
case 9:
answer = "High";
}
return answer;
}