Campbell Scientific LoggerNet Datalogger Support Software - Manual (Page 183)

Section 5. Real-Time Tools
5.2.1.4.2 Order of Precedence
When processing mathematical expressions, the order of precedence is:
• Anything inside parentheses ( )
• Exponentiation ^
• Negation (unary) –
• Multiplication *, division /
• Modulo (remainder) MOD
• Addition +, subtraction –
When consecutive operators have the same priority, the expression evaluates
from left to right. This means that an expression such as a-b-c is evaluated as
(a-b)-c.
5.2.1.4.3 Predefined Constants
Constant Description
e
2.718282
PI 3.141593
True –1
False 0
NOPLOT NAN
NAN
NAN (not a number)
INF INF (non-finite number)
5.2.1.4.4 Predefined Time Constants
These predefined time constants can be useful as a parameter for the Functions
with State, where the interval parameter must be specified in nanoseconds.
Constant Description
nsecPerUSec Number of nanoseconds in a microsecond
nsecPerMSec Number of nanoseconds in a millisecond
nsecPerSec Number of nanoseconds in a second
nsecPerMin Number of nanoseconds in a minute
nsecPerHour Number of nanoseconds in an hour
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