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Top Forums Shell Programming and Scripting Perl code to differentiate numeric and non-numeric input Post 302109221 by Yogesh Sawant on Monday 5th of March 2007 01:36:10 AM
Old 03-05-2007
this one identifies integers, real numbers, and negative numbers as well:
Code:
#!/usr/bin/perl
use strict;

print "Enter a number: ";
chomp (my $num = <STDIN>);

if ($num =~ m/^-?\d+$/) {
    print "An integer \n";
}
elsif ($num =~ m/^-?\d+[\/|\.]\d+$/) {
    print "real number! \n";
}
else {
    print "not a number \n";
}

 

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posttek(1)							   User Commands							posttek(1)

NAME
posttek - PostScript translator for Tektronix 4014 files SYNOPSIS
posttek [-c num] [-f name] [-m num] [-n num] [-o list] [-p mode] [-w num] [-x num] [-y num] [file...] /usr/lib/lp/postscript/posttek DESCRIPTION
The posttek filter translates Tektronix 4014 graphics files into PostScript and writes the results on the standard output. If no files are specified, or if - is one of the input files, the standard input is read. OPTIONS
-c num Print num copies of each page. By default, only one copy is printed. -f name Print text using font name. Any PostScript font can be used, although the best results will be obtained only with constant width fonts. The default font is Courier. -m num Magnify each logical page by the factor num. Pages are scaled uniformly about the origin which, by default, is located at the cen- ter of each page. The default magnification is 1.0. -n num Print num logical pages on each piece of paper, where num can be any positive integer. By default, num is set to 1. -o list Print pages whose numbers are given in the comma-separated list. The list contains single numbers N and ranges N1 - N2. A missing N1 means the lowest numbered page, a missing N2 means the highest. The page range is an expression of logical pages rather than physical sheets of paper. For example, if you are printing two logical pages to a sheet, and you specified a range of 4, then two sheets of paper would print, containing four page layouts. If you specified a page range of 3-4, when requesting two logical pages to a sheet; then only page 3 and page 4 layouts would print, and they would appear on one physical sheet of paper. -p mode Print files in either portrait or landscape mode. Only the first character of mode is significant. The default mode is landscape. -w num Set the line width used for graphics to num points, where a point is approximately 1/72 of an inch. By default, num is set to 0 points, which forces lines to be one pixel wide. -x num Translate the origin num inches along the positive x axis. The default coordinate system has the origin fixed at the center of the page, with positive x to the right and positive y up the page. Positive num moves everything right. The default offset is 0.0 inches. -y num Translate the origin num inches along the positive y axis. Positive num moves everything up the page. The default offset is 0.0. EXIT STATUS
The following exit values are returned: 0 Successful completion. non-zero An error occurred. FILES
/usr/lib/lp/postscript/forms.ps /usr/lib/lp/postscript/ps.requests ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWpsf | +-----------------------------+-----------------------------+ SEE ALSO
download(1), dpost(1), postdaisy(1), postdmd(1), postio(1), postmd(1), postprint(1), postreverse(1), attributes(5) NOTES
The default line width is too small for write-white print engines, such as the one used by the PS-2400. SunOS 5.10 9 Sep 1996 posttek(1)
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