---
title: Build in numeric variables
description: "Read values from your scene to use them in your expression. | Variable | Explanation | | --- | --- | | framef alternate: $FF | Floatingpoint version of the current frame, which updates also on subframes. | | frame…"
url: "https://storm-vfx.com/docs/build-in-numeric-variables/"
updated: "2021-05-30"
category: General / Expressions
---

# Build in numeric variables

Read values from your scene to use them in your expression.

| Variable | Explanation |
| --- | --- |
| framef alternate: $FF | Floatingpoint version of the current frame, which updates also on subframes. |
| frame | Integer version of the current frame. It doesn’t change in the frame’s substeps. |
| time | Current time in the simulation in seconds. |
| dt | Timestep |