**Author:** `omniplex`

**Description:**

MOD and DIV behave different than in any programming language I've heard of.

1: Apparently "x MOD y" is handled like "trunc(x) - trunc(y) * trunc(x / y)",

e.g. "8.9 mod 3 = 2", "8 mod 3.2 = 2", "8 mod 2.7 = 0".

2: "x DIV y" is a misleading synonym for "x / y", no integer division.

3: A desperately needed "trunc" is missing, see [[m:Template talk:YMD2MJD]].

Proposed "fix" (or rather feature request):

2': Let "x DIV y" return "trunc( x / y )" also known as integer division.

3': This improved DIV automagically offers "x DIV 1" to get "trunc( x )".

1': Let "x MOD y" return "x - y * (x DIV y)" using the improved DIV.

With these two fixes (not counting 2') porting algorithms like Euclid's

GCD or date + time calculations should be more straight forward.

Using two #ifexpr: plus two #expr: +/-"0.5 round 0" to emulate trunc is

a royal PITA for formulae needing dozens of signed integer divisions.

The equation x MOD y = x - y * (x DIV y) should be okay, otherwise kill

DIV, as is it's at best redundant (but more likely harmful).

**Version**: unspecified

**Severity**: trivial

**URL**: http://meta.wikimedia.org/wiki/Help:Calculation