About
A significant digit is a digit that can't be removed from the number without modifying its value.
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Definition
Most
The most significant digit is the left-most nonzero digit
Least
The least significant digit is the right-most known digit.
Total
The total number of significant digit is the total number of digit
Precision
| Precision | Rounded to significant figures | Rounded to decimal places |
| 6 | 12.3450 | 12.345000 |
| 5 | 12.345 | 12.34500 |
| 4 | 12.35 | 12.3450 |
| 3 | 12.3 | 12.345 |
| 2 | 12 | 12.35 |
| 1 | 10 | 12.3 |
| 0 | N/A | 12 |