The Format Number block converts a number into text.
Example A:

Input value 10 is converted to text with value 10.
Example B:

By opening the dialog by clicking on the gear icon, the formatting and localization can be set.
Result:
The input value is converted from a number to a text.
Tips and best practices:
All mathematical blocks can calculate floating-point numbers. The separator is a dot, not a comma. Example: 2.7
Library:
Math