# Numeric parameter
Numeric parameters are **replaced by a single or a pair of numeric values** in your query. They are a good choice if you need to filter your data by specific range or calculate analysis based on numeric values.
## **Numeric Parameter Settings**
When creating a numeric parameter, there are a few settings to be defined:
### **Values**
Choose your preferred slider and scale type, be it simple or range for slider type, and discrete or continuous for scale, to optimize data collection according to your needs.
* **Simple Slider:** Allows for the selection of a single numeric value.
* **Min Value:** The smallest value a user can select.
* **Default Value:** The initial value that is presented when the parameter is first used.
* **Max Value:** The largest value a user can select.
Defining Simple Slider Values
* **Range Slider:** Enables the selection of a pair of numeric values, defining a range.
* **Min Value:** The smallest value within the range a user can select.
* **Max Value:** The largest value within the range a user can select.
Defining Range Slider Values
* **Scale:** Determines the selection scope and type on a slider, which can be either continuous or discrete.
* **Continuous:** Allows unrestricted selection of any value within a defined range.
* **Discrete:** Permits selection from specific values within a range, controlled by a "*Step Increment*" that defines the interval between selectable values.
### **Naming**
* **Display name:** The name that will appear in the control UI.
* **SQL name(s):** The name(s) to be used in the SQL query to be replaced by the control UI value(s).
## **Using Numeric Parameters in your SQL Query**
Once the parameter is created, we should manually add it (using its SQL name) to one or more of your SQL Query data sources.
**Simple Slider**
```sql
SELECT ST_BUFFER(geom,{{buffer_size}}) as geom
FROM carto-demo-data.demo_tables.newyork_newjersey_ooh_panels
```
After adding the parameter to your SQL query data sources, the control UI will appear in the right-side panel, allowing users to define a **custom numeric value**:
Control UI for a Numeric Parameter using Simple Slider
**Range Slider**
```sql
SELECT * FROM carto-demo-data.demo_tables.riskanalysis_railroad_accidents
WHERE highest_speed_reported >= {{highest_speed_from}} AND highest_speed_reported <= {{highest_speed_to}}
```
After adding the parameter to your SQL query data sources, the control UI will appear in the right-side panel, allowing users to define the **min and max** **pair of numeric values**:
Control UI for a Numeric Parameter using Range Slider
