模板:Significant figures/doc

概要

此模板提供兩個函數，取決於輸入。

1. 如果只提供一個參數，該模板計算提供的數字的有效數字。超出10¹²至 10⁻¹²、−10⁻¹²至−10¹²的數字將被忽略。
2. 如果提供兩個參數，該模板將第一個數字舍為第二個參數給出的有效數字數。

範例

兩個參數

• {{significant figures|123.456|7}} → 123.4560
• {{significant figures|123.456|6}} → 123.456
• {{significant figures|123.456|5}} → 123.46
• {{significant figures|123.456|4}} → 123.5

---

• {{significant figures|123,456|3}} → 123,000
• {{significant figures|12345.6|3}} → 12,300
• {{significant figures|1234.56|3}} → 1,230
• {{significant figures|12.3456|3}} → 12.3
• {{significant figures|1.23456|3}} → 1.23

---

• {{significant figures|.123456|3}} → 0.123
• {{significant figures|.0123456|3}} → 0.0123
• {{significant figures|.00123456|3}} → 0.00123
• {{significant figures|0.123456|3}} → 0.123
• {{significant figures|0.0123456|3}} → 0.0123
• {{significant figures|0.00123456|3}} → 0.00123

---

• {{significant figures|123.456|2}} → 120
• {{significant figures|123.456|1}} → 100
• {{significant figures|123.456|0}} → 0

---

• {{significant figures|987654321|9}} → 987,654,321
• {{significant figures|987654321|8}} → 987,654,320
• {{significant figures|987654321|7}} → 987,654,300
• {{significant figures|987654321|6}} → 987,654,000
• {{significant figures|987654321|5}} → 987,650,000
• {{significant figures|987654321|4}} → 987,700,000
• {{significant figures|987654321|3}} → 988,000,000
• {{significant figures|987654321|2}} → 990,000,000
• {{significant figures|987654321|1}} → 1.0×10⁹

一個參數

• {{significant figures|123400}} → 4
• {{significant figures|12340}} → 4
• {{significant figures|1234}} → 4
• {{significant figures|123.4}} → 4
• {{significant figures|12.34}} → 4
• {{significant figures|1.234}} → 4

---

• {{significant figures|0.1234}} → 4
• {{significant figures|0.01234}} → 4
• {{significant figures|0.001234}} → 4
• {{significant figures|.1234}} → 4
• {{significant figures|.01234}} → 4
• {{significant figures|.001234}} → 4

---

• {{significant figures|-123.4}} → 4
• {{significant figures|-12.34}} → 4
• {{significant figures|-1.234}} → 4

相關模板和模組

• {{Significant figures/rnd}}，使用{{Rnd}}，其使用{{#invoke:Math|precision_format}}
• {{Significant figures/sum}}，使用{{Precision}}，其使用{{#invoke:Math|precision}}
• {{Order of magnitude}}