Javascript字符串问题 [英] Javascript String Question

问题描述

我正在尝试用一个名为''makex''的函数编写一个JS程序。此函数应接受一个参数，然后返回一个字符串，该字符串重复字母X的次数与参数一样多。

例如，如果我调用makex（5）它应该输出XXXXX（5 X'' S）。到目前为止，这是我的代码：

I''m trying to write a JS program with a function called ''makex''. This function should accept a parameter and then return a string that repeats the letter X as many times as the parameter.
For example, if I called makex(5) it should output XXXXX (5 X''s). Here''s my code so far:

function makex(howMany)
{ 
  console.log("The parameter was "+howMany);
  for(var x = 0; x <= howMany; x++)
  {
   console.log(x); 
  }
}
  
console.log(makex(5));

推荐答案

试试这个：

Try this:

function makex(howMany) {
  if (howMany < 0)
    throw new RangeError("Invalid string length");

  var strBuf = '';

  while (howMany--)
    strBuf += "x";

  return strBuf;
}

尝试

Try

function makex(howMany)
{
console.log("The parameter was "+howMany);
string t;

for(var x = 0; x <= howMany; x++)
{
  t = t + 'X';
}
console.log(x);
}

如果你想让字母动态即允许任何字母而不只是X，试试

If you want to make the letter dynamic i.e. allow any letter instead of just X, try

function makex(howMany, text)
{
console.log("The parameter was "+howMany);
string t = t + 'X';

for(var x = 0; x <= howMany; x++)
{
  t = t + text;
}
console.log(x);
}

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