# My example of imperative does not work, why? **URL:** \ **Category:** DesignScript\ **Created:** [December 20, 2021, 2:39pm UTC](https://forum.dynamobim.com/t/my-example-of-imperative-does-not-work-why/71552 "2021-12-20T14:39:58Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![Draxl\_Andreas](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/draxl_andreas/32/145744_2.png) [@Draxl\_Andreas](https://forum.dynamobim.com/u/Draxl_Andreas)\ **Post date:** [December 20, 2021, 2:39pm UTC](https://forum.dynamobim.com/t/my-example-of-imperative-does-not-work-why/71552/1 "2021-12-20T14:39:58Z")
Hello dynos, I try to understand imperativ and his practical use. Do you know something about it f.e.: ![2021-12-20_15h37_14](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/f/6/f6313401e362bc78a48852226754736cfb8d7d66.png) Is there a `Maths.Rand` comment? or do i use wrong syntex? Do you have other exampels? KR Andreas ---
**Author:** ![jacob.small](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/jacob.small/32/161030_2.png) [@jacob.small](https://forum.dynamobim.com/u/jacob.small)\ **Post date:** [December 20, 2021, 2:57pm UTC](https://forum.dynamobim.com/t/my-example-of-imperative-does-not-work-why/71552/2 "2021-12-20T14:57:15Z")
This might help you out: https://www.youtube.com/embed/SndGdDpeY84?feature=oembed&wmode=opaque&list=PLdlF7MirPEC2yNFTGymESd3t7Xosfk9c2 ---
**Author:** ![Alien](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/alien/32/40701_2.png) [@Alien](https://forum.dynamobim.com/u/Alien)\ **Post date:** [December 20, 2021, 4:17pm UTC](https://forum.dynamobim.com/t/my-example-of-imperative-does-not-work-why/71552/3 "2021-12-20T16:17:53Z")
I have no idea… but if I write it as \>\>DSCore.Maths.Rand\<\< it goes grey ---
**Author:** ![Draxl\_Andreas](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/draxl_andreas/32/145744_2.png) [@Draxl\_Andreas](https://forum.dynamobim.com/u/Draxl_Andreas)\ **Post date:** [December 20, 2021, 4:23pm UTC](https://forum.dynamobim.com/t/my-example-of-imperative-does-not-work-why/71552/4 "2021-12-20T16:23:36Z")
![2021-12-20_17h22_58](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/8/7/874f949b1390ff9b49b819e1eec1fc572bfcefa9.png) ![2021-12-20_17h25_02](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/1/d/1d7f8cba2bcf90487de31182d7ae3ebede26129c.png) But it is still not working i try random list It could also be a tapstop problem, the output is 6 times cero so it adds nothing to the interation(i) in Python i would use append! but in designScript i don`t know KR Andreas ---
**Author:** ![EdsonMatt](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/edsonmatt/32/124725_2.png) [@EdsonMatt](https://forum.dynamobim.com/u/EdsonMatt)\ **Post date:** [December 20, 2021, 4:30pm UTC](https://forum.dynamobim.com/t/my-example-of-imperative-does-not-work-why/71552/5 "2021-12-20T16:30:01Z")
You’re writing “Maths”, try `DSCore.Math.Round(x)`. Maths is from archilab. ![image](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/9/4/94853af25a56c603d678d321b0ef65116d295505.png) ---
**Author:** ![Alien](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/alien/32/40701_2.png) [@Alien](https://forum.dynamobim.com/u/Alien)\ **Post date:** [December 20, 2021, 5:02pm UTC](https://forum.dynamobim.com/t/my-example-of-imperative-does-not-work-why/71552/6 "2021-12-20T17:02:46Z")
Hahaha!! I didn’t spot that! Surprised I personally don’t do that more often tbh. I’ve got used to typing, “color” instead of “colour”… Shame we can’t have proper English in Python as well as the American 😆 ---
**Author:** ![Draxl\_Andreas](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/draxl_andreas/32/145744_2.png) [@Draxl\_Andreas](https://forum.dynamobim.com/u/Draxl_Andreas)\ **Post date:** [December 21, 2021, 8:41am UTC](https://forum.dynamobim.com/t/my-example-of-imperative-does-not-work-why/71552/7 "2021-12-21T08:41:00Z")
![2021-12-21_09h38_30](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/5/8/587871252692514c058ad263be9914e17fa1011d.png) i tried this, just for understanding: Why i need “x” ? f.e. when i say x = 1, every i+x is the same Why does x know it is a float? KR Andreas ---
**Author:** ![EdsonMatt](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/edsonmatt/32/124725_2.png) [@EdsonMatt](https://forum.dynamobim.com/u/EdsonMatt)\ **Post date:** [December 21, 2021, 1:31pm UTC](https://forum.dynamobim.com/t/my-example-of-imperative-does-not-work-why/71552/8 "2021-12-21T13:31:42Z")
> [@Draxl\_Andreas](#): > > Why i need “x” ? You don’t need “x”, I’ve just used x for example purpose and, of course, because the function `Round` requires an argument. > [@Draxl\_Andreas](#): > > f.e. when i say x = 1, every i+x is the same In your case, when you use x = 1 the for loop add each i to the value: ![image](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/c/8/c844aaa26e910850ce6978cc9068742aa745707c.png) > [@Draxl\_Andreas](#): > > Why does x know it is a float? This is interesting, although the function requires the input as `integer,` if you feed it with variables, it’ll output different numbers haha. ![image](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/b/f/bf8d3fdd6c0034d79bd3df858e1c1cf9df39be60.png)