Interjection is a word or phrase that expresses a sudden emotion
Example
Hurray!,We won the match
Here,'Hurray!' is an Interjection
Note:-
Interjections always end with exclamation mark !
Shhh!. ..dont make noise
Here,'Shhh!' is an Interjection
Alas! , we lost the game
Here,'Alas!' is an Interjection
Oh! , I didn't know about that
Here,'Oh!' is an Interjection