You are using a loop that is never exited, no matter what the input.
Also, there is a difference between a string comparison and a numerical comparison.
A case statement can only match patterns. Like @jgt mentioned, in that syntax a pattern like [50-59] will match a single character, in this case when it is 5, 0-5 or 9.
The [ ... ] syntax does not allows for the use of || within the brackets.
You would need to use
For numerical comparisons keywords like -eq, -lt, -le and such are used (see man test)
--
Note: Be careful with spaces < = is not the same as <=
Last edited by Scrutinizer; 04-16-2018 at 12:03 AM..
This User Gave Thanks to Scrutinizer For This Post:
Hello guys..
well, im kinda newbie with unix because i started to learn it like 2 weeks ago.
then i started to make some exercises, but i got stucked on this one :
so, i need to know how many different 'names' has the 5th field and how many times each name appears.
i was trying with a... (6 Replies)
Hello guys.
Well, on this exercise i need the average "chargeAmount" per hour (for each hour).
with this code :
cat getusagesummarywrongmatch | grep -iv MOU2GRTObject | cut -d'|' -f4,14 | grep -i chargeamount | cut -d' ' -f2
http://img227.imageshack.us/img227/5889/65969235do0.jpg
i got... (2 Replies)
How do I write a shell script file to read 5 student names (First and Last name) and their grades using a While Loop? Find the Average, Maximum, and Minimum of grades using the same While Loop. Prompt the user using tput to enter the information (first name, last name, grade). Save the data in a... (1 Reply)
Hi, 'm trying to do an exercicise, and one part is:
ls -l $1 | awk '
BEGIN {
max = $5;
}
{
if ($5 > max){
max = $5;
}
}
END {
print "Tamanio mayor fichero = " max; }'
# Imprimimos ahora el menor tamaņo de fichero
ls -l $1 | awk '... (4 Replies)
you are to write a program which will read in a tax rate (as a percentage) and the prices of 5 items. the program is to calculate the total price, before tax, of the items and then the tax payable on those items, and then the total amount due. the tax payable is computed by appliying the tax rate... (1 Reply)
hello everyone!:)
I have an exercise which I think is difficult for beginner like me. Here is the exercise
Create a shell script, which takes a directory as command line argument.
Script displays ten first lines from every text file in that directory. After
displaying the lines from the... (1 Reply)
Hi,
I am learning unix. I want to practice few small excercises. Please suggest me some goor URL to practice.
Thanks in advance. (1 Reply)
Discussion started by: stew
1 Replies
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viewperl
VIEWPERL(1) User Commands VIEWPERL(1)NAME
viewperl - quickly view syntax highlighted Perl code
SYNOPSIS
viewperl [OPTION]... FILE...
DESCRIPTION
View a Perl source code file, syntax highlighted.
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view CODE, syntax highlighted
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display line numbers
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display the name of each file (default)
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supress display of file names (implied by --no-reset)
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display inline POD documentation (default)
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hide POD documentation (line numbers still increment)
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reset formatting and line numbers each file (default)
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supress resetting of formatting and line numbers
-s, --shift=WIDTH
set tab width (default is 4)
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translate tabs into spaces (default)
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supress translating of tabs into spaces
--help display this help and exit
Note that module names should be given as they would appear after a Perl `use' or `require' statement. `Getopt::Long', for example.
Each string given using -c is considered a different file, so line number and formatting resets will apply.
View a Perl source code file, syntax highlighted.
-c, --code=CODE
view CODE, syntax highlighted
-l, --lines
display line numbers
-L, --no-lines
supress display of line numbers (default)
-m, --module=FILE
consider FILE the name of a module, not a file name
-n, --name
display the name of each file (default)
-N, --no-name
supress display of file names (implied by --no-reset)
-p, --pod
display inline POD documentation (default)
-P, --no-pod
hide POD documentation (line numbers still increment)
-r, --reset
reset formatting and line numbers each file (default)
-R, --no-reset
supress resetting of formatting and line numbers
-s, --shift=WIDTH
set tab width (default is 4)
-t, --tabs
translate tabs into spaces (default)
-T, --no-tabs
supress translating of tabs into spaces
--help display this help and exit
Note that module names should be given as they would appear after a Perl `use' or `require' statement. `Getopt::Long', for example.
Each string given using -c is considered a different file, so line number and formatting resets will apply.
viewperl August 2007 VIEWPERL(1)