few small scripting questions Post: 302089527

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Top Forums Shell Programming and Scripting few small scripting questions Post 302089527 by bebop1111116 on Tuesday 19th of September 2006 02:58:41 PM

09-19-2006

Registered User

few small scripting questions

hello everyone, i have a couple of questions about programming with shell scripts.

-My question is, how do you find out how long a sequence of numbers that has just been entered is. for example

If i enter 12345 the length here is 5
and 23456789 the length here is eight.

I want to be able to do an if statment that says if the string of numbers are a certain length do somthing, else do somthing.

-My last question, how do you tell your program that if you have a number, and you divide it by another number to do one thing if it divides evenly and something else if it is not? for example

lets say i have a while statement, and i want to say while the number i have is not evenly divisiable then display a message, but as soon as it can be evenly divided display a different message. And i do have a way of changing the number i am dividing by each time.

Thanks

Last edited by bebop1111116; 09-19-2006 at 04:53 PM..

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LEARN ABOUT FREEBSD

ppmdist

ppmdist(1)						      General Commands Manual							ppmdist(1)

NAME

       ppmdist - simplistic grayscale assignment for machine generated, color images

SYNOPSIS

       ppmdist [-intensity|-frequency] [ppmfile]

DESCRIPTION

       Reads a portable pixmap as input, performs a simplistic grayscale assignment intended for use with grayscale or bitmap printers.

       Often conversion from ppm to pgm will yield an image with contrast too low for good printer output.  The program maximizes contrast between
       the gray levels output.

       A ppm input of n colors is read, and a pgm of n gray levels is written.	The gray levels take on the values 0..n-1, while maxval  takes	on
       n-1.

       The mapping from color to stepped grayscale can be performed in order of input pixel intensity, or input pixel frequency (number of repeti-
       tions).

OPTIONS

       -frequency    Sort input colors by the number of times a color appears in the input, before mapping to  evenly  distributed  graylevels	of
		     output.   -intensity  Sort input colors by their grayscale intensity, before mapping to evenly distributed graylevels of out-
		     put.  This is the default.

BUGS

       Helpful only for images with a very small number of colors.  Perhaps should have been an option to ppmtopgm(1).

SEE ALSO

       ppmtopgm(1), ppmhist(1), ppm(5)

AUTHOR

       Copyright (C) 1993 by Dan Stromberg.

								   22 July 1992 							ppmdist(1)