句中單詞首字母大寫確保字串的每個單詞首字母都大寫，其餘部分小寫。

像’the’和’of’這樣的連線符同理.

titleCase(“I’m a little tea pot”) 應該返回一個字串 titleCase(“I’m a little tea pot”) 應該返回 “I’m A Little Tea Pot”. titleCase(“sHoRt AnD sToUt”) 應該返回 “Short And Stout”. titleCase(“HERE IS MY HANDLE HERE IS MY SPOUT”) 應該返回 “Here Is My Handle Here Is My Spout”.

function titleCase(str) {
 
str=str.toLowerCase();

  var array=str.split(" ");

  var num=array.length;

  var i=0;

 for(i;i<num;i++){

   array[i]=array[i].charAt(0).toUpperCase()+array[i].slice(1);

    }

 str=array.join(" ");

 return str;

}