float to string

Using Arduino Programming Questions
1

Hello
is there a way to get from float to string
something like:

string result;
float test = 14535;
test = test/100;

result + = test;

2

Do you mean a String or a string ?

3

I need it as a string so I can send it over ethernet
string or String? what you propose.
I think that it is string I need to use

4

string is better but demands more attention.

This works:

char buf[20];//must be large enough ho hold result

void setup(){
  Serial.begin(115200);
  ftoa(buf, -12.34, 2, ',');
  Serial.println(buf);
}//setup()

void loop(){}//loop()

char *ftoa(char *a, double f, int precision, char delim){
  long p[] = {0,10,100,1000,10000,100000,1000000,10000000,100000000};
  char *ret = a;
  if(f < 0){//negative
    f = -f;
    *a++ = '-';
  }//negative
  long i = floor(f);
  f -= i;
  itoa(i, a, 10);
  while (*a != '\0') a++;
  *a++ = delim;
  itoa(f*p[precision], a, 10);
  return ret;
}//ftoa()