Hello @ajaymeghtech
Greetings of the day..!!
Firstly create a currency that you want to show on the front end from Settings >> Currencies >> Create Currency as I created EURO as shown in the below image.
currency.png
Now go to Stores >> Channels >> Edit the Default channel from actions.
edite.png
Now enable the EURO currency from here and click on Save Channel
save.png
Now Check your output on the Frontend.
euro.png
Thanks & Regards..!!