Math Library

The Source Code file math.hei, located in the lib directory, is part of the package you receive when you download heitml.

We only have a few math function as of today (), but you are free to define the math functions you need. If you are using heitml on UNIX, you can even add built-in math functions through the userfun.c module.

Also, don't forget that there are already quite a number of heitml Built-in Numerical functions to serve your needs, so be sure to review that section of the Language Reference.

Example:

input:	resulting output:
<? abs(42)>	42
<? abs(-42)>	42
<? abs(12-42)>	30

Example:

input:	resulting output:
<? sqr(5)>	25
<? sqr(sqr(5))>	625

Example:

input:	resulting output:
<? cube(3)>	27
<? cube(sqr(2))>	64

Example:

input:	resulting output:
<? power(2,16)>	65536
<? power(cube(sqr(2)),4)>	16777216

Example:

input:	resulting output:
<? log10(-1) "Nn">	null
<? log10(0) "Nn">	null
<? log10(.001)>	-3
<? log10(.1)>	-1
<? log10(1)>	0
<? log10(10)>	1
<? log10(50)>	1
<? log10(100)>	2