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id	title	challengeType	videoUrl	forumTopicId	dashedName
56533eb9ac21ba0edf2244d7	小于或等于运算符	1	https://scrimba.com/c/cNVR7Am	16788	comparison-with-the-less-than-or-equal-to-operator

--description--

使用小于等于运算符（<=）比较两个数字的大小。如果在小于等于运算符左边的数字小于或者等于右边的数字，它会返回 true。如果在小于等于运算符左边的数字大于右边的数字，它会返回 false。与相等运算符类似，小于或等于运算符会转换数据类型。

例如

4   <= 5
'7' <= 7
5   <= 5
3   <= 2
'8' <= 4

按顺序，这些表达式会返回 true、true、true、false 和 false。

--instructions--

添加小于等于运算符到指定行，使得函数的返回语句有意义。

--hints--

testLessOrEqual(0) 应该返回 Smaller Than or Equal to 12

assert(testLessOrEqual(0) === 'Smaller Than or Equal to 12');

testLessOrEqual(11) 应该返回 Smaller Than or Equal to 12

assert(testLessOrEqual(11) === 'Smaller Than or Equal to 12');

testLessOrEqual(12) 应该返回 Smaller Than or Equal to 12

assert(testLessOrEqual(12) === 'Smaller Than or Equal to 12');

testLessOrEqual(23) 应该返回 Smaller Than or Equal to 24

assert(testLessOrEqual(23) === 'Smaller Than or Equal to 24');

testLessOrEqual(24) 应该返回 Smaller Than or Equal to 24

assert(testLessOrEqual(24) === 'Smaller Than or Equal to 24');

testLessOrEqual(25) 应该返回 More Than 24

assert(testLessOrEqual(25) === 'More Than 24');

testLessOrEqual(55) 应该返回 More Than 24

assert(testLessOrEqual(55) === 'More Than 24');

应该使用 <= 运算符至少两次

assert(code.match(/val\s*<=\s*('|")*\d+('|")*/g).length > 1);

--seed--

--seed-contents--

function testLessOrEqual(val) {
  if (val) {  // Change this line
    return "Smaller Than or Equal to 12";
  }

  if (val) {  // Change this line
    return "Smaller Than or Equal to 24";
  }

  return "More Than 24";
}

testLessOrEqual(10);

--solutions--

function testLessOrEqual(val) {
  if (val <= 12) {  // Change this line
    return "Smaller Than or Equal to 12";
  }

  if (val <= 24) {  // Change this line
    return "Smaller Than or Equal to 24";
  }

  return "More Than 24";
}

2.4 KiB Raw Blame History