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This template is to help facilitate the displaying of variable names (in mathematics, computer source code, etc.) with the semantically correct <var>...</var> , which also renders the variable in italics, as is customary, and to do so in a serif font. This is specifically for the use of the characters "I" (upper-case i) and "l" (lower-case L), which in many sans-serif fonts can be difficult to distinguish. The template also very slightly adjusts the font size of the enclosed variable, to account for typical difference in between non-fancy serif (e.g., Times and Times New Roman) and sans-serif (e.g. Arial and Helvetica) typefaces. The template should not be used generally, but only for "I" and "l", and perhaps other cases where a known visual ambiguity can be shown to exist in common sans-serif fonts for readers without acute vision. It is recommended to use {{ var | 1 }} rather than {{ varserif | 1 }} for "1" (numeral one), as it is usually more clearly distinguishable from "I" and "l" in sans-serif than serif fonts.

{{ Varserif }} need not be used for variables that simply contain "I" or "l", only for cases in which readers are likely to be unable to distinguish them visually.

The {{ varserif }} method is preferred to simply italicizing and using inline style to specify the font, for , , semantic Web , and reasons; XHTML's <var> element has semantic meaning, while simple font changes like italicizing does not.

Because the font styling in the template is done entirely with CSS , it has no effect at all upon content semantics, nor does it change the output for users of screen reader software.

Example:

{{varserif|I}}

outputs:

<var style="font-size:118%;font-family:serif;">I</var>

which renders as:

I

Comparisons

{{var|I}} = I

{{var|l}} = l

{{var|1}} = 1

{{varserif|I}} = I

{{varserif|l}} = l

{{varserif|1}} = 1

Please note that {{ varserif }} is not a panacea; its treatment of the numeral "1" is easily mistaken for the letter "l" (lower-case "L") in many serif fonts.

Recommended usage

{{varserif|I}} = I

{{varserif|l}} = l

{{var|1}} = 1

{{var| variable }} for any other variable