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Old 01-26-2006, 03:24 AM   #1
dreams
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How to get ascii value (decimal ) of chars in linux?


How to get ascii value (decimal ) of chars in linux ?
e.g.

ascii a
-> result: 97

Is there any command like that?

thank u so much
 
Old 01-26-2006, 04:02 AM   #2
StringCheesian
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hexdump
man hexdump
 
Old 01-26-2006, 04:30 AM   #3
dreams
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hello StringCheesian
hexdump 's parameter must be a file
It couldn't be a char
what i want to get is , input a char followed by a command , and the output is the ascii value
 
Old 01-26-2006, 06:49 AM   #4
timmeke
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Have you tried looking at "printf"?
If you know it from C, it is pretty much the same.
"printf" allows you to print the value of a shell variable, in different formats.
Try printing the char as an integer (%d), octal or hex number.

Most shells have "printf" as a built-in command.
 
Old 01-26-2006, 09:35 AM   #5
pixellany
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or type "ascii" into Google and find one of a bazillion "decoder rings" published by good samaritans.
 
Old 01-26-2006, 10:11 AM   #6
berbae
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Hello dreams
You may try:

echo 'a'|od -N 1 -i

which gives:

0000000 97
0000001

Or to get only the value:

echo 'a'|od -N 1 -i|head -1|tr -s " "|cut -d " " -f 2

Is this usable by you?

Last edited by berbae; 01-26-2006 at 10:23 AM.
 
Old 01-26-2006, 10:36 AM   #7
PTrenholme
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Quote:
Originally Posted by dreams
hello StringCheesian
hexdump 's parameter must be a file
It couldn't be a char
what i want to get is , input a char followed by a command , and the output is the ascii value
Not quite true: It can be stdin from a pipe:
Code:
$ echo -n a | hexdump -d
0000000   00097
0000001
or, if you just want the decmil value:
Code:
$ echo -n a | hexdump -d | gawk '{print $2}'
00097
Edit:

Or, if you want an ascii command:
Code:
$ cat ascii
#! /bin/bash
echo `echo -n $1 | hexdump -d | gawk '{print $2}'`
$ ./ascii a
00097

Last edited by PTrenholme; 01-26-2006 at 10:48 AM.
 
Old 01-26-2006, 09:34 PM   #8
dreams
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I have handled followed by your suggestions.
Thank u so much indeed everyone.
 
Old 01-27-2006, 08:43 AM   #9
marozsas
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man ascii gives to you the same.
 
  


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