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Top Forums Shell Programming and Scripting [Solved] String integer comparison Post 302886475 by madhan_dc on Friday 31st of January 2014 10:16:25 PM
Old 01-31-2014
[Solved] String integer comparison

I am trying to execute something like this

Code:
file=/tmp/test.txt
firstline=$(head -n 1 $file)
value=`echo $firstline | cut -d'=' -f2`

if [ "$value" -gt "2" ]
then
echo true
fi

i read the first line of a file, cut to the numeric value in the first line and check if it greater than 2

but for some reason the "value" variable doesnt store it as integer.

I get : integer expression expected at the if loop.

cant seem to understand why? If i store a number in value like

value=3 then it works fine. How do i make sure when i do a cut it stores it as integer.

I tried

typeset -i value=`echo $firstline | cut -d'=' -f2`

but that gave me arithmatic operator error.

please advise. Thanks.

---------- Post updated at 10:16 PM ---------- Previous update was at 10:13 PM ----------

i also tried

Code:
if [ $value -gt 2 ]  without the quotes

still same error integer expression expected
 

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WORDWRAP(3)								 1							       WORDWRAP(3)

wordwrap - Wraps a string to a given number of characters

SYNOPSIS
string wordwrap (string $str, [int $width = 75], [string $break = "0], [bool $cut = false]) DESCRIPTION
Wraps a string to a given number of characters using a string break character. PARAMETERS
o $str - The input string. o $width - The number of characters at which the string will be wrapped. o $break - The line is broken using the optional $break parameter. o $cut - If the $cut is set to TRUE, the string is always wrapped at or before the specified $width. So if you have a word that is larger than the given width, it is broken apart. (See second example). When FALSE the function does not split the word even if the $width is smaller than the word width. RETURN VALUES
Returns the given string wrapped at the specified length. EXAMPLES
Example #1 wordwrap(3) example <?php $text = "The quick brown fox jumped over the lazy dog."; $newtext = wordwrap($text, 20, "<br /> "); echo $newtext; ?> The above example will output: The quick brown fox<br /> jumped over the lazy<br /> dog. Example #2 wordwrap(3) example <?php $text = "A very long woooooooooooord."; $newtext = wordwrap($text, 8, " ", true); echo "$newtext "; ?> The above example will output: A very long wooooooo ooooord. Example #3 wordwrap(3) example <?php $text = "A very long woooooooooooooooooord. and something"; $newtext = wordwrap($text, 8, " ", false); echo "$newtext "; ?> The above example will output: A very long woooooooooooooooooord. and something SEE ALSO
nl2br(3), chunk_split(3). PHP Documentation Group WORDWRAP(3)
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