How to read output of sed into a variable

Question

I have variable which has value \"abcd.txt\".

I want to store everything before the \".txt\" in a second variable, replacing the \".t

Answer 1

You can use command substitution as:

new_filename=$(echo "$a" | sed 's/.txt/.log/')

or the less recommended backtick way:

new_filename=`echo "$a" | sed 's/.txt/.log/'`