Title case sentence question

[sumitjha85]

function titleCase(str) {

  let temp=0;

for (let i=0;i<str.length;i++){

  if (str[i] ===" "){

    i +=1;

    temp = str.charCodeAt(str[i]);

    temp +=32;

    str[i]=String.fromCharCode(temp);

  }

}

return str;

}

titleCase("I'm a little tea pot");
// TypeError: Cannot assign to read only property '4' of string 'I'm a little tea pot'

[Jagaya]

Strings are “read only”, meaning you cannot override any value within them.
You can create a new string and tell JS to override the entire thing → meaning you tell it to assign the variable-name to a completly new object.
But you cannot string[i] = whatever.

[JeremyLT]

Pro tip: It’s easier for us to help if you write your question rather than just posting code