// Declaration of variables
int a = 0;
unsigned long b = 0;
float c = 0;
// Method: 1
// Display a
if ( a < 10){ Serial.print("0000");}
else if ( a < 100){ Serial.print("000");}
else if ( a < 1000){ Serial.print("00");}
else if ( a < 10000){ Serial.print("0");}
Serial.print(a);
// Display b
if ( b < 10){ Serial.print("0000");}
else if ( b < 100){ Serial.print("000");}
else if ( b < 1000){ Serial.print("00");}
else if ( b < 10000){ Serial.print("0");}
Serial.print(b);
// Display c
if ( c < 10){ Serial.print(" ");}
else if ( c < 100){ Serial.print(" ");}
else if ( c < 1000){ Serial.print(" ");}
else if ( c < 10000){ Serial.print(" ");}
Serial.print(c);
// Methode: 2
char Numa [11] ; // large enough for biggest long int
char Numb [11];
char Numc [11];
sprintf (buf, "%04i", a) ; // leading zeroes, at least 4 chars.
sprintf (buf, "%04i", b) ; // leading zeroes, at least 4 chars.
sprintf (buf, "%04i", c) ; // leading zeroes, at least 4 chars.
Serial.print (Numa) ;
Serial.print (Numb) ;
Serial.print (Numc) ;
