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# The Number block
The **Number** block sends the specified whole or decimal number. The number can be positive or negative. The **Number** block is often [inserted](/flows/reference/blocks/overview/#insert-data-blocks-into-other-blocks) into other blocks that perform math operations or assign values to numeric parameters.
## Output
The **Number** block's single output port sends the specified number.
## Setup
When you create a **Number** block, its specified number is **0**. Click the **0** to enter a new number, or increase or decrease by clicking 
or 
.
## Example
To see the **Number** block in an example flow, check out [Flow Snippets: Number](https://www.postman.com/postman/flows-snippets/flow/63b8b417a365885b55bc51fd).
## Related pages
For a tutorial that uses the **Number** block, see [Create a count-based loop with the Repeat block](/flows/tutorials/beginner/create-count-based-loop/).