freeCodeCamp/introducing-else-statements.md at dec409a4bd667e4979305cc1e86e0702bbc2c707

Oliver Eyton-Williams dec409a4bd fix: s/localeTitle/title/g

2020-10-06 23:10:08 +05:30

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id, challengeType, videoUrl, forumTopicId, title

id	challengeType	videoUrl	forumTopicId	title
56533eb9ac21ba0edf2244da	1	https://scrimba.com/c/cek4Efq	18207	介绍 else 语句

Description

当if语句的条件为真，大括号里的代码执行，那如果条件为假呢？正常情况下什么也不会发生。使用else语句，可以执行当条件为假时相应的代码。

if (num > 10) {
  return "Bigger than 10";
} else {
  return "10 or Less";
}

Instructions

请把多个if语句合并为一个if/else语句。

Tests

tests:
  - text: 你应该只有一个<code>if</code>表达式。
    testString: assert(code.match(/if/g).length === 1);
  - text: 你应该使用一个<code>else</code>表达式。
    testString: assert(/else/g.test(code));
  - text: <code>testElse(4)</code>应该返回 "5 or Smaller"。
    testString: assert(testElse(4) === "5 or Smaller");
  - text: <code>testElse(5)</code>应该返回 "5 or Smaller"。
    testString: assert(testElse(5) === "5 or Smaller");
  - text: <code>testElse(6)</code>应该返回 "Bigger than 5"。
    testString: assert(testElse(6) === "Bigger than 5");
  - text: <code>testElse(10)</code>应该返回 "Bigger than 5"。
    testString: assert(testElse(10) === "Bigger than 5");
  - text: 不要修改上面和下面的代码。
    testString: assert(/var result = "";/.test(code) && /return result;/.test(code));

Challenge Seed

function testElse(val) {
  var result = "";
  // Only change code below this line

  if (val > 5) {
    result = "Bigger than 5";
  }

  if (val <= 5) {
    result = "5 or Smaller";
  }

  // Only change code above this line
  return result;
}

// Change this value to test
testElse(4);

Solution

function testElse(val) {
  var result = "";
  if(val > 5) {
    result = "Bigger than 5";
  } else {
    result = "5 or Smaller";
  }
  return result;
}

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