Bash script: Appending text at the last character of specific line of a file

Question

I am trying to append a variable at the last character of a specific line of a file from a bash script.

The file is called myfile.txt and what I want to

Answer 1

Try

sed -e "s/^MYVERSION=/MYVERSION=.*$/&${VERSION}/g" < myfile.txt

The command appends the value of VERSION to the line with 'MYVERSION='