Serial com arduino

Hello friends, please help with this code for communication serial.

I use this code for reception, all is ok but i dont know how create this string for send...
i want use this code for communication two arduino, fist collect 4 analog input end after sent tougether to serial, i need creat this char ...or string to sent ... F255G0H100I1023A69x

if (Serial.available())
{
char myChar = Serial.read();
if (myChar == 'F')
{
myF = Serial.parseInt();
Serial.println(myF);
}
else if (myChar == 'G')
{
myG = Serial.parseInt();
Serial.println(myG);
}
else if (myChar == 'H')
{
myH = Serial.parseInt();
Serial.println(myH);
}
else if (myChar == 'I')
{
myI = Serial.parseInt();
Serial.println(myI);
}
else if (myChar == 'A')
{
myA = Serial.parseInt();
Serial.println(myA);
}

}

Welcome! A bit of bad news we cannot see what you have so you need to tell us. What Arduinos are you using. Ho2w are they connected to each other. Take the time to read the forum guidelines and repost your code so it can be read. The labels you use you understand, we have no clue to what example "myG" etc is. Annotate the code, it makes it easier for all.

ok, sorry, i take this exemple, i have 3 variable int for send F, G and H.
the code is good, tryed with serial monitor and its perfect.
now i dont know how created this "char myChar" for send...
this code is ok for arduino uno receive.

I need new code for arduino nano send this int myF,myG,myH; and caracter FGH

F255G0H100x

and process like this example:

int myF,myG,myH;

void setup()
{
  Serial.begin(9600);
}
void loop()
{
  if (Serial.available())
  {
    char myChar = Serial.read();
    if (myChar == 'F')
    { 
      myF = Serial.parseInt();
      Serial.println(myF);
    }
    else if (myChar == 'G')
    {
      myG = Serial.parseInt();
      Serial.println(myG);
    }
    else if (myChar == 'H')
    {
      myH = Serial.parseInt();
      Serial.println(myH);
    }
  }
}
Serial.print('F');
Serial.print(255);
Serial.print('G');
int g=0;
Serial.print(g);
// and so on