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Full Discussion: Addtion of two numbers
Top Forums Shell Programming and Scripting Addtion of two numbers Post 302549806 by Sambuddha on Wednesday 24th of August 2011 03:38:14 AM
Old 08-24-2011
Addtion of two numbers

Code:
for i in 1 2 3 4 5
do
  y='expr $i + 1';
  echo $y
done

After running this shell script i want the output to be
Code:
2
3
4
5
6

but the result is coming as
Code:
expr $i + 1
expr $i + 1
expr $i + 1
expr $i + 1
expr $i + 1

where am i doing wrong ? Cant i use expr to add two numbers and store that result into another variable ?
Please help.
Thank You

Moderator's Comments:
Mod Comment Please use code tags, thanks.

Last edited by zaxxon; 08-24-2011 at 04:52 AM.. Reason: code tags
 

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CBCODEC(1)						      Quick Database Manager							CBCODEC(1)

NAME
cbcodec - popular encoders and decoders SYNOPSIS
cbcodec url [-d] [-br] [-rs base target] [-l] [-e expr] [file] cbcodec base [-d] [-l] [-c num] [-e expr] [file] cbcodec quote [-d] [-l] [-c num] [-e expr] [file] cbcodec mime [-d] [-hd] [-bd] [-part num] [-l] [-ec code] [-qp] [-dc] [-e expr] [file] cbcodec csv [-d] [-t] [-l] [-e expr] [-html] [file] cbcodec xml [-d] [-p] [-l] [-e expr] [-tsv] [file] cbcodec zlib [-d] [-gz] [-crc] [file] cbcodec lzo [-d] [file] cbcodec bzip [-d] [file] cbcodec iconv [-ic code] [-oc code] [-ol ltype] [-cn] [-wc] [-um] [file] cbcodec date [-wf] [-rf] [-utc] [str] DESCRIPTION
This manual page documents briefly the cbcodec commands. cbcodec is a tool to use encoding and decoding features provided by Cabin. This command is used in the above format. file specifies a input file. If it is omitted, the standard input is read. OPTIONS
A summary of options is included below. For a complete description, see the file:///usr/share/doc/qdbm-doc/spex.html#cabincli. -d perform decoding (unescaping), not encoding (escaping). -br break up URL into elements. -rs resolve relative URL. -l output the tailing newline. -e expr specify input data directly. -c num limit the number of columns of the encoded data. -hd parse MIME and extract headers in TSV format. -bd parse MIME and extract the body. -part num parse MIME and extract a part. -ec code specify the input encoding, which is UTF-8 by default. -qp use quoted-printable encoding, which is Base64 by default. -dc output the encoding name instead of the result string when decoding. -t parse CSV. Convert the data into TSV. Tab and new-line in a cell are deleted. -html parse CSV. Convert the data into HTML. -p parse XML. Show tags and text sections with dividing headers. -tsv parse XML. Show the result in TSV format. Characters of tabs and new-lines are URL-encoded. -gz use GZIP format. -crc output the CRC32 checksum as hexadecimal and big endian. -ic code specify the input encoding, which is detected automatically by default. -oc code specify the output encoding, which is UTF-8 by default. -ol ltype convert line feed characters, with `unix'(LF), `dos'(CRLF), and `mac'(CR). -cn detect the input encoding and show its name. -wc count the number of characters of the input string of UTF-8. -um output mappings of UCS-2 characters and C strings of UTF-16BE and UTF-8. -wf output in W3CDTF format. -rf output in RFC 1123 format. -utc output the coordinate universal time. SEE ALSO
qdbm(3), cabin(3). AUTHOR
QDBM was written by Mikio Hirabayashi <mikio@fallabs.com>. This manual page was written by Fumitoshi UKAI <ukai@debian.or.jp>, for the Debian project (but may be used by others). Man Page 2005-05-23 CBCODEC(1)
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