回答編集履歴
1
情報の追加。
test
CHANGED
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@@ -19,3 +19,23 @@
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19
19
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> Math.round(x) === x
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20
20
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21
21
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> ```
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22
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23
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24
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25
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26
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27
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---
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28
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29
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30
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31
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**追記：**
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32
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33
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34
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35
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もっとよい物があった。
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36
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37
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38
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39
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【Number.isInteger() | MDN】
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40
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41
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[https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/Number/isInteger](https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/Number/isInteger)
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