Synopsis:
Meta-HTML contains a small set of commands for operating on numerical quantities.
All of the arithmetic operators described in this section can accept a number, or simply the name of a variable, which is then looked up as if it had been written with <get-var ...>
.
That is to say:
<set-var total = <add <get-var subtotals[0]>
<get-var subtotals[current]>>>
can be written as:
<set-var total = <add subtotals[0] subtotals[current]>>
Commands:
Variables:
More Information:
The binary arithmetic operators always expect two arguments, and will produce a warning message in DEBUGGING-OUTPUT
when given too few arguments.
You can perform floating point arithmetic if one or both of the arguments is already a floating point number:
<div 10 3> --> 3
<div 10.0 3> --> 3.33
Function Documentation
Returns the sum of ARG1 and ARG2.
<decrement VARNAME [BY=AMOUNT]>
|
Simple
|
Subtract AMOUNT (default 1) from the contents of the variable named by VARNAME.
<set-var foo=1>
<get-var foo> --> 1
<decrement foo>
<get-var foo> --> 0
Also see increment
.
Returns the quotient of ARG1 and ARG2.
<div 12 2> --> 6
<div 10 3> --> 3
<increment VARNAME [BY=AMOUNT]>
|
Simple
|
Add AMOUNT (default 1) to the contents of the variable named by VARNAME.
<set-var foo=1>
<get-var foo> --> 1
<increment foo>
<get-var foo> --> 2
Also see decrement
.
Returns the remainder of ARG1 and ARG2.
<mod 12 2> --> 0
<mod 10 3> --> 1
Returns the product of ARG1 and ARG2.
<mul 12 2> --> 24
Returns a pseudo-random number between 0 and ARG -1. The distribution is pretty good; calling <random 2>
returns 0 50% of the time, and 1 the other 50%.
Also see randomize
.
Sets the pseudo-random number generator seed to ARG. The next call to random
uses this seed value to find the next pseudo-random number. There is no return value.
<randomize 10>
<random 100> --> 28
<random 100> --> 15
<randomize 10>
<random 100> --> 28
Returns the difference of ARG1 and ARG2.
<sub 12 2> --> 10
Edit Section
Function Index
Variable Index

The
META-HTML
Reference Manual V1.4
Copyright © 1995, 1996,
Brian J. Fox,
1996, 1997 Universal Access Inc.
Found a bug? Send mail to
bug-manual@metahtml.com