using a bash function to better navigate your files, deep work

study.sh

function study() {
  if [[ $# -eq 0 ]]; then
    if [ -e study.txt ]; then
      #If there are no arguments, the function checks whether a file named "study.txt" exists in the current directory. 
      #If it exists, it writes the current working directory to a file named "study_dir.txt" on the user's desktop
      #and displays the contents of "study.txt" with line numbers.
      echo $PWD > /Users/username/desktop/macbook_pro_scripts/echo_files/study_dir.txt
      cat -n study.txt
    else
      hello_var=$(cat /Users/username/desktop/macbook_pro_scripts/echo_files/study_dir.txt)  
      cd $hello_var
      study_file='/study.txt'
      cat -n $hello_var$study_file
      echo $hello_var

    fi
  else 
    #will take one argument which is a number and will run the command in that line
    my_variable=$(sed -n "$1p" study.txt)
    eval "$my_variable"
    #echo $my_variable | pbcopy
  fi
}