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Merge pull request jsk3342#2 from jihoon-chae/main
Feat : 3번 문제추가
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Problems/3.type/README.md

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# 문제3 : 변수의 타입
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다음 출력 값으로 올바른 것은?
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```jsx
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var arr = [100, 200, 300];
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console.log(typeof(arr));
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```
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1) undefined
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2) string
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3) number
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4) object

Problems/3.type/solve.js

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// # 문제3 : 변수의 타입
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// 다음 출력 값으로 올바른 것은?
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var arr = [100, 200, 300];
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console.log(typeof(arr));
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// 1) undefined
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// 2) string
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// 3) number
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// 4) object

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