trying to accumulate a number in the same variable
Hello,
I trying to accumulate the same number in a variable:
Code:
#!/usr/bin/sh
infile="$1/$2"
if [[ ! -r $infile ]]
then
#echo "file is not readable: $infile"
exit 1
fi
awk '
{
num_cols=NF; # the number of columns in the current line
temp_cols=temp_cols+num_cols #add up no. of columns over multiple lines
}' <$infile >tst.txt
It is a shell script called t.sh. I execute it from the command line like:
print temp_cols;
Code:
./t.sh . inputfile.txt
The idea is that it's supposed to count the columns on each line and add them up except it doesn't.
The variable temp_cols always seems to contain the value of num_cols.
I am writing a script that needs to accept numbers into a variable by prompting and using the code
read num
case $num in
000)
break
;;
*)
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var1=1234;
....
I want to check if $var1 contains a number or not. Is there any built-in command or combination of commands available?
Thanks,
Suman (1 Reply)
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if ( $var is a number ) {
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}
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}
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Discussion started by: Pratik4891
1 Replies
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The following default shells are used by utilities: /bin/bash, /bin/csh, /bin/jsh, /bin/ksh, /bin/ksh93, /bin/pfcsh, /bin/pfksh, /bin/pfsh,
/bin/sh, /bin/tcsh, /bin/zsh, /sbin/jsh, /sbin/sh, /usr/bin/bash, /usr/bin/csh, /usr/bin/jsh, /usr/bin/ksh, /usr/bin/ksh93, /usr/bin/pfcsh,
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FILES
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