Trying to retreive and compare value

omahablues · #1 (**permalink**) 03-07-2007

Hi All,

I'm have a file test.txt that looks like this

1939399393
03094994949
948383

I have to check whether the first character in the first line is 1 or not. I have tried the following option but it seems to fail

head -1 test.txt | grep ^1

but it seems to display the entire first line without validating

Any suggestions.

Thanks

vino · #2 (**permalink**) 03-07-2007

Code:

sed -e "s/^\(.\).*/\1/g;q" | grep "1"

anbu23 · #3 (**permalink**) 03-07-2007

Code:

if [[ -n $( sed -n "/^1/s/.*/1/p;q" file ) ]]
then
   echo "First line contain 1 as first char"
fi

cfajohnson · #4 (**permalink**) 03-09-2007

Quote:

Originally Posted by omahablues

Hi All,

I'm have a file test.txt that looks like this

1939399393
03094994949
948383

I have to check whether the first character in the first line is 1 or not. I have tried the following option but it seems to fail

head -1 test.txt | grep ^1

but it seems to display the entire first line without validating

You don't need any external commands to do that:

Code:

read line < text.txt
case $line in
   1*) echo "First character is 1" ;;
   *) echo "First character is not 1" ;;
esac

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