where 과 count()의 차이

cpp 반복문 endl;

expo init 명령어를 실행했습니다 <img alt="스파르타 즉문즉답" src="https://media-sparta.s3.ap-northeast-2.amazonaws.com/media/tempfiles/community/4fc24efd-00da-4884-8937-a8cc04a3e7c4MjIyMjc2LjAxMDE2OTI3NDIzMTY3OTA5OTE3MTY2Ng=.png">그리곤 엔터를 쳤는데 <img alt="스파르타 즉문즉답" src="https://media-sparta.s3.ap-northeast-2.amazonaws.com/media/tempfiles/community/5183ab46-9ff5-4cf4-9617-77919eda3eb7MjUzNTY1LjE2ODc5OTExNjUxNjc5MDk5MzU4NjM4.png"> 이렇게 되더라구요..어떻게 해야 할까요?ㅠ