https://padlet.com/jinlee747474/o8oollyqdka2 How to use App Inventor & Learn Computational Thinking en-us 2019-03-06 16:36:20 UTC 2026-03-16 09:35:01 UTC hello@padlet.com https://padlet-assets.s3.amazonaws.com/icons/Playcontrol.png jinlee747474 https://padlet.com/jinlee747474/o8oollyqdka2/wish/338500335 사칙연산이 가능한 계산기를 만들어 보자.
두 숫자를 입력받을 텍스트 박스와
결과를 표시할 레이블, 사칙 연산이 가능한 버튼 네개가 필요

]]> 2019-03-06 17:23:06 UTC https://padlet.com/jinlee747474/o8oollyqdka2/wish/338500335 jinlee747474 https://padlet.com/jinlee747474/o8oollyqdka2/wish/338503582 1.  결과값을 기억시킬 수 있는 변수와 연산자를 기억시킬 수 있는 변수를 만들어 보자
2. 각 연산자에 번호를 매칭시켜 1일때 더하기, 2일때 빼기, 3일때 곱하기, 4일때 나누기를 할 수 있는 함수를 만들어 보자.
3. 텍스트 상자를 선택했을 때 초기화 될 수 있도록 해 보자.]]> 2019-03-06 17:28:30 UTC https://padlet.com/jinlee747474/o8oollyqdka2/wish/338503582 jinlee747474 https://padlet.com/jinlee747474/o8oollyqdka2/wish/338530115 여전히 텍스트 상자가 비어 있으면 에러 메세지가 출력된다.

어떻게 해결 할 수 있을까?

우리는 비어 있는지 판단할 수 있는 
IF문을 이용하여 해결해 보자.

텍스트 상자 1과 2가 비어있는가? 라면??]]> 2019-03-06 18:14:34 UTC https://padlet.com/jinlee747474/o8oollyqdka2/wish/338530115 jinlee747474 https://padlet.com/jinlee747474/o8oollyqdka2/wish/338545827 1. 사칙연산이 중간에 배치 되고 마지막 " =" 버튼을 이용하여 계산되게 수정
2. 첫번째 수와 두번째 수 변수 만들어 활용

]]> 2019-03-06 18:41:32 UTC https://padlet.com/jinlee747474/o8oollyqdka2/wish/338545827 jinlee747474 https://padlet.com/jinlee747474/o8oollyqdka2/wish/338547722 수정 필요]]> 2019-03-06 18:44:39 UTC https://padlet.com/jinlee747474/o8oollyqdka2/wish/338547722 jinlee747474 https://padlet.com/jinlee747474/o8oollyqdka2/wish/338687948 음악첨부파일]]> 2019-03-07 02:18:14 UTC https://padlet.com/jinlee747474/o8oollyqdka2/wish/338687948 jinlee747474 https://padlet.com/jinlee747474/o8oollyqdka2/wish/338688531 2019-03-07 02:21:40 UTC https://padlet.com/jinlee747474/o8oollyqdka2/wish/338688531 jinlee747474 https://padlet.com/jinlee747474/o8oollyqdka2/wish/338731927 2019-03-07 06:59:15 UTC https://padlet.com/jinlee747474/o8oollyqdka2/wish/338731927 https://padlet.com/jinlee747474/o8oollyqdka2/wish/338732834 2019-03-07 07:05:12 UTC https://padlet.com/jinlee747474/o8oollyqdka2/wish/338732834 https://padlet.com/jinlee747474/o8oollyqdka2/wish/338736160 2019-03-07 07:24:43 UTC https://padlet.com/jinlee747474/o8oollyqdka2/wish/338736160 jinlee747474 https://padlet.com/jinlee747474/o8oollyqdka2/wish/338758064 2019-03-07 08:57:39 UTC https://padlet.com/jinlee747474/o8oollyqdka2/wish/338758064 https://padlet.com/jinlee747474/o8oollyqdka2/wish/338758446 2019-03-07 08:58:59 UTC https://padlet.com/jinlee747474/o8oollyqdka2/wish/338758446 jinlee747474 https://padlet.com/jinlee747474/o8oollyqdka2/wish/341216397 2019-03-14 09:01:21 UTC https://padlet.com/jinlee747474/o8oollyqdka2/wish/341216397 https://padlet.com/jinlee747474/o8oollyqdka2/wish/341216647 2019-03-14 09:02:17 UTC https://padlet.com/jinlee747474/o8oollyqdka2/wish/341216647 https://padlet.com/jinlee747474/o8oollyqdka2/wish/341216661 2019-03-14 09:02:19 UTC https://padlet.com/jinlee747474/o8oollyqdka2/wish/341216661 https://padlet.com/jinlee747474/o8oollyqdka2/wish/341217706 2019-03-14 09:05:28 UTC https://padlet.com/jinlee747474/o8oollyqdka2/wish/341217706 https://padlet.com/jinlee747474/o8oollyqdka2/wish/343660905 2019-03-21 08:27:34 UTC https://padlet.com/jinlee747474/o8oollyqdka2/wish/343660905