Morse code Translator

Using Arduino Programming Questions
#1

Hey I am following the book 30 arduino projects for the evil genius by simon monk and I am stuck on project 3. I don’t know what is causing the problem, but here is the message:

Arduino: 1.6.3 (Windows 8.1), Board: "Arduino Uno"
Project_03_morse_translator.ino: In function ‘void loop()’:
Project_03_morse_translator.ino:38:5: error: expected ‘}’ before 'else’
Project_03_morse_translator.ino: At global scope:
Project_03_morse_translator.ino:43:1: error: expected declaration before ‘}’ token
Error compiling.
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Please help as soon as possible
Thanks :stuck_out_tongue:

int ledPin = 12;

char* letters[] = {
  ".-", "-...", "-.-.", "-..", ".", "..-.", "--.", "....", "..",    // A-I
  ".---", "-.-", ".-..", "--", "-.", "---", ".--.", "--.-", ".-.",  // J-R
  "...", "-", "..-", "...-", ".--", "-..-", "-.--", "--.."          // S-Z
};

char* numbers[] = {"-----", ".----", "..---", "...--", "....-", ".....", "-....", "--...", "---..", "----."};

int dotDelay = 200;

void setup()
{
  pinMode(ledPin, OUTPUT);
  Serial.begin(9600);
}

void loop()
{
  char ch;
  if (Serial.available())
  {
    ch = Serial.read();
    if (ch >= 'a' && ch <= 'z')
    {
      flashSequence(letters[ch - 'a']);
    }
    else if (ch >= 'A' && ch <= 'Z')
    {
      flashSequence(letters[ch - 'A']);
    }
    else if (ch >= '0' && ch <= '9');
    {
      flashSequence(numbers[ch - '0']);
    }
    else if (ch == ' ');
    {
      delay(dotDelay * 4);
    }
  }
}

void flashSequence(char* sequence)
{
  int i = 0;
  while (sequence[i] != NULL)
  {
    flashDotOrDash(sequence[i]);
    i++;
  }
  delay(dotDelay * 3);
}

void flashDotOrDash(char dotOrDash)
{
  digitalWrite(ledPin, HIGH);
  if (dotOrDash == '.')
  {
    delay(dotDelay);
  }
  else
  {
    delay(dotDelay * 3);
  }
  digitalWrite(ledPin, LOW);
  delay(dotDelay);
}
#2

You have semicolons terminating some of your if statements when it is clear you intended the following block to be the body of the if statement.

#3