## [xsl] Function that reduces the number of digits to the right of the decimal point?

 Subject: [xsl] Function that reduces the number of digits to the right of the decimal point? From: "Roger L Costello costello@xxxxxxxxx" Date: Tue, 23 Jun 2020 14:28:24 -0000
```Hi Folks,

\$num is a variable holding a decimal value.

\$desired-number-of-digits-after-decimal-point is a variable holding an integer
value.

I want a function that reduces the number of digits to the right of the
decimal point in \$num according to the value specified in
\$desired-number-of-digits-after-decimal-point

Example #1:
\$num = 42.366978
\$desired-number-of-digits-after-decimal-point = 2
The result of applying the function is: 42.36

Example #2:
\$num = 42.366978
\$desired-number-of-digits-after-decimal-point = 0
The result of applying the function is: 42

Below is one way to implement the function. Is there a better way? By "better"
I mean simpler, more correct.

Also, is there a better name for the function?  By "better" I mean shorter,
more standardized. /Roger
-----------------------------------------------------
<xsl:function name="f:reduce-number-of-digits-after-decimal-point"
as="xs:string">
<xsl:param name="num" as="xs:string" />
<xsl:param name="desired-number-of-digits-after-decimal-point"
as="xs:integer" />

<xsl:variable name="whole-part" select="substring-before(\$num, '.')"/>
<xsl:variable name="fraction-part" select="substring-after(\$num, '.')"/>
<xsl:variable name="reduced-fraction-part"
select="substring(\$fraction-part, 1,
\$desired-number-of-digits-after-decimal-point)"/>
<xsl:choose>
<xsl:when test="\$desired-number-of-digits-after-decimal-point gt 0">
<xsl:value-of select="concat(\$whole-part, '.',
\$reduced-fraction-part)"/>
</xsl:when>
<xsl:otherwise>
<xsl:value-of select="\$whole-part"/>
</xsl:otherwise>
</xsl:choose>
</xsl:function>

```