Created
June 9, 2014 12:31
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四捨五入 / 切り下げ / 切り上げ
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| //四捨五入 | |
| Math.round(2.1); | |
| // 切り下げ | |
| Math.floor(2.1); | |
| // 切り上げ | |
| Math.ceil(2.1) |
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