回答編集履歴
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コードブロックとコードの修正
test
CHANGED
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@@ -1,12 +1,56 @@
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ちと出先なので動くか確認できてないですが、こんな感じになるのではないかと思います
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Jan 17, 2020 PM1:10追記 動いていなかったので修正
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6
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7
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8
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```js
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10
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const rounded = [
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1000,
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1200,
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16
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999,
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1999,
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9,
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112.35813,
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-14142.1356
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].map(x => roundUpWithFirst2Digit(x));
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document.write(`<ul><li>${rounded.join('</li><li>')}</li></ul>`);
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/*
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1000
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1200
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1000
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2000
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10
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120
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-14000
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*/
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function roundUpWithFirst2Digit(x) {
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const digit
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const digitLength = ('' + Math.abs(Math.trunc(x))).length;
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switch(digitLength) {
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56
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@@ -16,10 +60,12 @@
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default:
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const multi = 10 ** digitLength
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const multi = 10 ** (digitLength - 2);
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64
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return Math.ceil(x
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return Math.ceil(x / multi) * multi;
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}
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}
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```
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