I'm having some trouble with using "case...esac" in Bash.
I've googled it and am stuggling to understand the syntax and how to do certain things.
Firstly, I want to be able to choose a case based on a variable number
For example, I have in my code a place where a user can enter a number using read.
Code:
read SEL
Then I want to use a case to decide what should be done.
I want it to be able to figure out whether it is a number or letter.
Using "if" you can always use
Code:
if [ $SEL -eq $SEL 2>/dev/null ]
then
echo "Is Number"
else
echo "Contains Letters or Symbols"
fi
I also want to have a case based on ranges of numbers too, but the upper range isn't a fixed number
So, in my code I find what the last number will be and define it as LASTNUM
In my case I want it be
Code:
case "$SEL"
0)
# Do Something for 0
;;
1-$LASTNUM)
# Do something for between 1 and LASTNUM
;;
Any variation of Q q or Quit)
# Do something for Q, q or Quit
;;
*)
# Do something for everything else
;;
esac
I've been really struggling and any help would be much appreciated.
Please - this is my FIRST ever attempt on scrip and I just want simple answer if possible.
I am modifying existing and working script.
I just want to and more to it so I started with simple insertion of working code into menu.
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case $var in
)
echo "Lower case alphabet"
;;
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"--"|"--""-")
"--""-"")
while
do
echo "Current Argument is ${1}"
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I have a script that is taking input like this:
a
b
c
d
aa
bb
aaa
bbb
ccc
ddd
and formating it to be like this:
a b c d
aa bb
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else
echo no match
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