Remote Processing BASIC for the CX-10 Modbus - Manual (Page 48)

BASIC PROGRAMMING GUIDE
2-39
PI
Syntax: PI
Function: Stored constant 3.1415926
Mode: Command, run
Use: PRINT PI
DESCRIPTION
PI is closer to 3.141592653, so proper rounding should be 3.1415927. However, trig errors were greater when
7 was used than 6 for the last digit.