Template:Numdisp/doc

The Template:Numdisp processes a number, for display, by checking to display a fraction part (at "/"). If there is no fraction, it checks for a negative number,…

Template:Numdisp/doc

The Template:Numdisp processes a number, for display, by checking to display a fraction part (at "/"). If there is no fraction, it checks for a negative number, to show a Unicode &minus ("−"). Otherwise, it just uses parser-function {{formatnum:{{{1|6000}}}}} to add commas, such as to show "6,000". In 99% of recent Wikipedia usage, there are relatively few articles using fractions (less than 1% of articles using Template:Convert show fractions).

Usage:  {{numdisp|6+3/8}}   →   6+3⁄8
{{numdisp|-4-1/2}}   →   −4−1⁄2
{{numdisp|23500}}   →   23,500
{{numdisp|2300+643/1250}} → 2300+643⁄1250
{{numdisp|14+6/ }} → Expression error: Unexpected < operator.

Implementation

The check, for fraction parts, uses parser-function {{#titleparts:xx/xx|1|2}} to split a number at "/" (if any, as in: 6+3/8) and then checks if part 2 (the denominator, after the slash) contains a number, to trigger use of {{numdisp/fracparts}}). Hence, the template uses:

#if: {{#titleparts:{{{1|6+3/8}}}|1|2}}

That if-expression will be true if a denominator exists (such as "8" in "6+3/8").


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