Rosetta code

To demonstrate the syntax different, below is the same program written in several languages. The output of each program should look like this:

A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12
B1 B2 B3 B4 B5 B6 B7 B8 B9 B10 B11 B12
C1 C2 C3 C4 C5 C6 C7 C8 C9 C10 C11 C12
D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 D12
E1 E2 E3 E4 E5 E6 E7 E8 E9 E10 E11 E12
F1 F2 F3 F4 F5 F6 F7 F8 F9 F10 F11 F12
G1 G2 G3 G4 G5 G6 G7 G8 G9 G10 G11 G12
H1 H2 H3 H4 H5 H6 H7 H8 H9 H10 H11 H12

(You can copy the code into a text editor and the line numbers will not be pasted as part of the selection.)

NOTE: These are not optimized for each language, for example taking advantage of vector operations and special features. They are intended to show how similar elements (loops, printing, ASCII characters, string concatenation) are phrased in different languages.

Python 2.7 or earlier

#!/usr/bin/env python	
for Letter in range(65,73): # step character 65 to 72	
   Labels=''	
   for Number in range(1,13):	
     Labels += chr(Letter) + str(Number) + ' ' 	
   print Labels   # print the whole line

Python 3

#!/usr/bin/env python	
for Letter in range(65,73): # step character 65 to 72	
   Labels=''	
   for Number in range(1,13):	
      Labels += chr(Letter) + str(Number) + ' ' 	
   print(Labels)     # print the whole line

Perl

#!/usr/bin/env perl	
for ($Letter = 65; $Letter < 73; $Letter++) {  # step character 65 to 72	
   $Labels = "";	
   for ($Number = 1; $Number < 13; $Number++) {	
      $Labels .= chr($Letter) . $Number . " " ;	
   }	
   print $Labels . "\n "  # print the whole line	
}

bash shell

#! /bin/bash	
for LET in {A..H}	
do 	
   LABEL=""	
   for NUM in {1..12}	
   do	
      LABEL="$LABEL $LET$NUM"	# must have no spaces
   done	
   echo $LABEL  # print the whole line	
done

C
Note that C is a compiled, not an “interpreted” language, so in order to run this you will have to save it as rosetta.c, then compile it with the terminal comand:

gcc rosetta.c

This assumes that you have the C compiler gcc installed. The executable produced by this command will be called a.out, and if its directory is not in your path, it can be run from its directory by typing:

./a.out

# include <stdio.h>
char letter;	
int number;	
 
int main(void){	
   for (letter = 65; letter <= 72; letter++) {	
      for (number = 1; number <= 12; number++) {	
         printf("%c%d ",letter,number);	
      }	
      printf("\n");  // print the line break	
   }	
   return 0;	
}

C++

Note that to run this you will have to save it as rosetta.cpp, then compile it with the terminal comand:

g++ rosetta.cpp

As with C, this assumes that you have the C++ compiler called g++ installed. Upon success, the executable will be called a.out, and if the directory where a.out resides is not in your path, it can be run from its directory by typing:

./a.out

#include <iostream>	
using namespace std;	
 
char letter;	
int number;	
 
int main(){	
   for (letter = 65; letter <= 72; letter++) {	
      for (number = 1; number <= 12; number++) {	
         cout << letter << number <<" ";	
      }	
      cout << endl; // print the end of line char	
   }	
}

Java
To run, save as rosetta.java
Compile with: javac rosetta.java
Execute with: java Rosetta // capitals because that matches the class name

class Rosetta {	
   public static void main(String[] args){	
     for(int letter = 65; letter < 73; letter++){     //Step through the ASCII values	
       for(int number = 1; number < 13; number++){ 	
         System.out.print((char)letter + (number + " ")); //print w/o LineFeed	
       }	
       System.out.println();	
     }	
   }	
 }

JavaScript
JavaScript is the language used to make web pages dynamic. It is interpreted by your web browser program, so save this script in a file with the extension .html, and drag it into a browser window to see the output:

<html> <body> 	
<pre>	
<script type="text/javascript"> 	
var letter, number; 	
document.write("<br>");	
   for (letter = 65; letter <= 72; letter++) {	
      for (number = 1; number <= 12; number++) {	
         document.write(String.fromCharCode(letter) + number + " ");	
      }	
      document.write("<br>"); // print an html line break	
   }	
</script> 	
</pre>	
</body> </html>

PHP

<html> <body>	
Table of values<br><br>	
<?php 	
for($Letter = 65; $Letter <= 72; $Letter++) {	
   $Label='';	
   for($Number = 1; $Number <= 12; $Number++) {	
      $Label .= chr($Letter) . strval($Number) ." ";	
   }	
   echo $Label . "<br>"; // print an html line break	
}	
?>	
</body> </html>

Ruby

Note, in Ruby, uppercase variable names mean that they are constant.
Here we can either use lowercase, or start with an underscore.

#! /usr/bin/env ruby
for letter in 65..72 # step character 65 to 72
  label = ''
  for number in 1..12
    label += letter.chr + "#{number}" + " "
  end  # end for number
  puts(label) # print the whole line
end  # end for letter

MATLAB

for Letter = 65:72   % step through character 65 to 72	
   Labels = '';	
   for Number  = 1:13	
     Labels = [Labels char(Letter) num2str(Number) ' ' ];	
   end % for Number	
   disp(Labels)  % print the whole line	
end % for Letter

#! /usr/bin/env Rscript	
 
for (Letter in 65:72) {   # step through character 65 to 72	
  Lines = ''	
  for (Number in 1:12) {	
    cat(intToUtf8(Letter),Number,' ',sep="")	
  } # end for Number	
  cat("\n")  # print the whole line	
} # end for Letter

Mathematica

TableForm[
Outer[StringJoin, CharacterRange["A", "H"], 
ToString /@ Range[1, 12]]]

Arduino

This program is written to be uploaded to an Arduino device, which will then generate the desired output and sent it out along the serial port. Connect to the Arduino, monitor the serial connection, and restart the device to see the output:

char Letter;	
int Number;	
 
void setup(){	
   Serial.begin(19200); 	
   for (Letter = 65; Letter<= 72; Letter++) {	
      for (Number = 1; Number <= 12; Number++) {	
         Serial.print(byte(Letter));	
         Serial.print(Number);	
         Serial.print(" ");	
      }	
      Serial.println(); // print a line break	
   }	
}
void loop(){} // a loop section is required

Rosetta code

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