Equivalent of a Variable in a Macro?

Hi everyone, I'm a Roll20 Noob, and I am needing some help with a macro I am building.  How can I can have a macro assign the result of a specific auto dice roll to a 'variable' so that value can be used multiple times in different parts of the macro?  For example, I am building a macro to help create Pre-Rolled PCs for my games.  I want to have a fair random distribution of heights & weights.  To keep things from being too crazy, I need to link the height to the weight, but also allow for some bounded randomness.  For example, with a Human female, I can get a random height by [[1d18+55]] in. which will give me a height which is 4'7" to 6'1" tall.  But if I then use another completely random calculation for the weight, I can end up with a 4'7" female weighing 245lbs.  Possible, but far more unlikely than what is coming up.  I have been trying to use a modified BMI calculation, but it requires knowing the height, and so far I have not figured out how to assign the 1d18+55 roll to a variable name.  I sure there must be a way because it works for Query Rolls since Query Name can be referenced multiple times with always the same value.  But how do you assign a value to a placeholder without a Query?

Roll20 macros cant save the result of a roll to a variable, unfortunately.  there are two ways you can get what you want, one easier than the other. Both require a Pro subscription, which you have. The hard way: write a custom API script to do the calculation. The easier way: use two separate macros and the API script ChatSetAttrs.      The first macro, you'd roll the hight and use chatSetAttrs to save it to an attribute on a character sheet.     The second macro would read that height from the character sheet, perform your calculation, and give you the weight (which you can save directly to a character sheet using chatSetAttrs).     Note that this does require two separate macros. You run the first one, then run the second-  you can't combine them due to the way roll20's Order of Operations.

Thanks!  I'll give it a try.

Depending on how the calculation is done, this might be a time the ability to display the result of an individual roll/calculation might work. [[[[1d8+55]] whatever calculation uses the height in inches here]] pounds $[[0]] inches <a href="https://wiki.roll20.net/Reusing_Rolls" rel="nofollow">https://wiki.roll20.net/Reusing_Rolls</a>

That's great!&nbsp; I read the links and your suggestion.&nbsp; Then some patient testing and got: /w gm &amp;{template:default} {{name=Human}} {{Age: [[1d10+18]] (Male [[round([[([[1d18+60]]**2)]]*[[(1d40/10+20)/703]])]] lbs and $[[1]] inches tall.) (Female[[round([[([[1d18+55]]**2)]]*[[(1d40/10+20)/703]])]] lbs and $[[4]] inches tall.)}} Thanks again!

If you want to break that up for easier reading this should work /w gm &amp;{template:default} {{name=Human}} {{Age=[[1d10+18]]}} {{ Male=[[round([[([[1d18+60]]**2)]]*[[(1d40/10+20)/703]])]] lbs and&nbsp; $[[1]] inches tall.}} {{Female=[[round([[([[1d18+55]]**2)]]*[[(1d40/10+20)/703]])]] lbs and&nbsp; $[[4]] inches tall.}}

Nice!

That's a great edit, GiGs!&nbsp; It does make it easier to read.&nbsp; I still have a lot learn on the nuances of the Macros, much less the API scripts.&nbsp; The remainder of the macro calls a number of rolling tables in which I have other characteristics, such as eyes, hair, skin color, as well as languages, background, etc.,&nbsp; My goal is to have my NPCs and Pre-Rolled PCs as randomly generated as possible, as quickly as possible. I have gone through the online wiki helps for both, but all the lessons seem to assume the reader has a basic understanding of the overall macro structure and syntax.&nbsp; I last professionally programmed in 1996 (moved into network design instead), so a lot has changed since then.&nbsp; Can either of you recommend a good 'Dummies Guide' on Roll20 Macro &amp; API structures?&nbsp; I always do best when I understand the overall architecture and logic, instead of unlinked puzzle pieces....

Final version (including roll tables): /w gm &amp;{template:default} {{name=Human}} {{Age=[[1d10+18]] Eyes:[[1t[Human-EyeColor]]]}} {{Hair=[[1t[Human-HairColor]]]}}&nbsp; {{Skin=[[1t[Human-SkinColor]]]}} {{Male=[[round([[([[1d18+60]]**2)]]*[[(1d40/10+20)/703]])]] lbs and&nbsp; $[[4]] inches tall.}} {{Female=[[round([[([[1d18+55]]**2)]]*[[(1d40/10+20)/703]])]] lbs and&nbsp; $[[6]] inches tall.}}

I based the equation around the BMI standard, plus height and weight ranges as specified by Forgotten Realms, with an element of randomness.&nbsp; I will be porting this over to the other PC races as well.