How to loop over files in directory and change path and add suffix to filename

Question

I need to write a script that starts my program with different arguments, but I\'m new to Bash. I start my program with:

./MyProgram.exe Data/data1.txt [Logs/d

Answer 1

for file in Data/*.txt
do
    for ((i = 0; i < 3; i++))
    do
        name=${file##*/}
        base=${name%.txt}
        ./MyProgram.exe "$file" Logs/"${base}_Log$i.txt"
    done
done

The name=${file##*/} substitution (shell parameter expansion) removes the leading pathname up to the last /.

The base=${name%.txt} substitution removes the trailing .txt. It's a bit trickier if the extensions can vary.