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javascript Find the Longest Word in a String

 Return the length of the longest word in the provided sentence.

Your response should be a number.


思路:先把句子转化为单词数组,然后创建一个变量,并赋初值为0,让这个变量与每个单词的长度进行比较,如果这个变量小于等于这个单词长度,则将这个变量更新为单词的长度。在一个for循环中比较下去,就可以得到最长的单词的长度。


function findLongestWordLength(str) {
  var strarr = str.split(" ");//用空格进行分割.
  var longest = 0;//记录并更新每两个比较
  console.log(strarr);

  for(let i=0;i<strarr.length;i++){
    if (longest<=strarr[i].length)
    {
      longest = strarr[i].length;
    }

  }
  console.log(longest);
  return longest;
}

findLongestWordLength("The quick brown fox jumped over the lazy dog");




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