Question loop in webgl template preprocessor directives?

I was taking a look at Tamplate variables, macros, and conditional directives, and was wondering if it's possible to achieve a loop like explained here. I have a custom user variable that is a number and would like to make a for loop with it.

For example, instead of

#if MYVAR === 0
//bla
#endif

#if MYVAR === 1
//bla
#endif

I would like to do something equivalent of

#for i = 0; i < MYVAR; ++i
//bla
#endfor

 

Sorry to bother you, but I was just wondering how do you use MYVar?

I set
PlayerSettings.SetTemplateCustomValue("BETA_BUILD", "test"); and
#if {{{BETA_BUILD }}} in the html, but this throws an error?

thanks sir