Built-In variables need to export?

[shaybery]

If I want to change the PS1 now and I want that also if I will run bash I will see the same PS1, do I need to defice the bash with export?

for example :
#> PS1="X>"
X> bash
X> bash ????? or in order the PS1 to be X> in this point I need to export the PS1

[koradesnehal]

yah u need to export PS1
use this command
export PS1

then u will get same prompt in every shell