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* A period/full point (<code>.</code>), {{em|never}} a comma, is used as the decimal point ({{xt|6.57}}, not {{!xt|6,57}}). | * A period/full point (<code>.</code>), {{em|never}} a comma, is used as the decimal point ({{xt|6.57}}, not {{!xt|6,57}}). | ||
* Numbers between −1 and +1 require a leading zero ({{xt|0.02}}, not {{!xt|.02}}); exceptions are sporting performance averages ({{xt|.430 [[Wikipedia:Batting average|batting average]]}}) and commonly used terms such as {{xt|.22{{nbsp}}caliber}}. | * Numbers between −1 and +1 require a leading zero ({{xt|0.02}}, not {{!xt|.02}}); exceptions are sporting performance averages ({{xt|.430 [[Wikipedia:Batting average|batting average]]}}) and commonly used terms such as {{xt|.22{{nbsp}}caliber}}. | ||
* Indicate repeating digits with an [[Wikipedia:Vinculum (symbol)|overbar]] e.g. <code><nowiki>14.31 | * Indicate repeating digits with an [[Wikipedia:Vinculum (symbol)|overbar]] e.g. <code><nowiki>14.31<span style="text-decoration:overline">28</span></nowiki></code> gives <span style="color:green">14.31<span style="text-decoration:overline">28</span></span>. (Consider explaining this notation on first use.) Do not write e.g. {{!xt|14.31(28)}} because it resembles notations for {{section link||Uncertainty and rounding}}. | ||
====Grouping of digits==== | |||
* Digits should be grouped and separated either by commas or narrow gaps ({{em|never}} a period/full point). | * Digits should be grouped and separated either by commas or narrow gaps ({{em|never}} a period/full point). | ||
:; Grouping with commas | :; Grouping with commas | ||