Using constants in formula expressions
You can use the following common mathematical constants in your expressions. All constants are case insensitive.
Note
If you define a variable with the same name as a constant, the variable overrides the constant.
Constant  Description 


The number pi ( 

The number e: 

Equivalent to the number 1. In AWS IoT SiteWise, Booleans convert to their number equivalents. 

Equivalent to the number 0. In AWS IoT SiteWise, Booleans convert to their number equivalents. 

Equivalent to no value. You can use this constant to output nothing as the result of a conditional expression. 