Every time I change the directory I get only current directory name but I want full path what cmd should I use in my .bashrc file ?
currently, i am trying as follows
export PS1="\W >"
But it does not work
Your problem is that you are using uppercase W and not lowercase w.
Here is a good page for an intro to customizing the shell prompt. https://linuxhint.com/bash-ps1-customization/