Given a number, program must return the alphabet letter correspondent

Question

The program

Given a number, program must return the alphabet letter correspondent.

Rules

• The challenge here is to make it as short as possible, everyone knows it is a very easy program to do.
• The number is not zero-based, it means 1 is A, 2 is B, 3 is C and so it goes...
• Any language will be accepted.

Answer 1

DC - 6 characters

Full program including input and output.

?64+af

save to file and run with $ dc file

Answer 2

C, 4 chars

x+64

plus I must pad the body of this answer...

Answer 3

APL (4)

(Full program)

⎕⌷⎕A

Explanation:

⎕ (user input) ⌷ (index) ⎕A (alphabet)

(They're supposed to be boxes, it's not an encoding problem.)

Answer 4

Brainfuck, 107

>,----------[>++++++[-<------>],----------]<[<]>>[<--[->++++++++++<]>>]+++++++[-<+++++++++>]<-.>++++++++++.

Answer 5

J, 7 characters

a.{~64+

Usage:

   a.{~64+1
A

Answer 6

Python 9

chr(64+x)

Or, reading from stdin and printing to stdout: 21

print chr(64+input())

Answer 7

R, 11 characters

LETTERS[x]

Usage:

LETTERS[21]
[1] "U"

Answer 8

q/k (7)

As partially applied composition:

10h$64+

Answer 9

Ruby 1.9 (10)

(x+64).chr

Reading from STDIN and printing to STDOUT:

$><<(gets.to_i+64).chr

Answer 10

Burlesque (6 characters)

Assuming the number is already on the stack:

64.+L[

(see here in action.).

Does the usual: Add 64, convert to character based on ASCII value.

If number is supplied as a string via stdin to stdout (10 characters):

ri64.+L[sh

Alternative version without using ASCII value conversion:

'@'Zr@\/!!

Answer 11

PHP 442

$alphabet = Array('A' => 1,'B' => 2,'C' => 3,'D' => 4,'E' => 5,'F' => 6,'G' => 7,'H' => 8,
'I' => 9,'J' => 10,'K' => 11,'L' => 12,'M' => 13,'N' => 14,'O' => 15,'P' => 16,'Q' => 17,
'R' => 18,'S' => 19,'T' => 20,'U' => 21,'V' => 22,'W' => 23,'X' => 24,'Y' => 25,'Z' => 26
)

function testInputForAlphabetCharacter($input){
    for($index = 0; $index < count($alphabet); $i = $i + 1){
        if($alphabet[$index] == $input){
            echo($index);
        }
    }
}


$input = $_GET['input'];
testInputForAlphabetCharacter($input);

Answer 12

Javascript, 25 chars

String.fromCharCode(66-x);

PHP, 22 chars

echo chr(66-$argv[0])

Answer 13

perl

chr(($ARGV[0] + 64))

Verification :

risk@skynet:~/perl$ for x in {1..26}; do perl ./ord.pl $x; done;
ABCDEFGHIJKLMNOPQRSTUVWXYZrisk@skynet:~/perl$

Answer 14

GolfScript, 7

64+]''+

Commentary

64    # corresponds to '@' in ASCII (65 is 'A')
+]    # add the input to 64. ']' is used for ASCII.
''+   # the conversion process

1 corresponds to A

26 corresponds to Z