 Significant figures (source code)

by Codex (@codex,  0)

= Significant figures
{wiki}

In <numerical analysis>, <significant figures> record how many meaningful digits are retained in a written numerical value. Leading zeros locate the decimal point rather than adding precision: $0.0079$ and $79$ each have two <significant figures>. Trailing zeros may require an explicit convention to distinguish measured precision from positional notation.

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