Operators in expressions

The following tables show operand types and results of arithmetical and logical operations.

When evaluating any expressions, there holds that if any operand in a calculation is invalid, the result is also invalid. However, an exception is an eval tag, if the parameter "Replace Invalid values with 0" is set. Then it is evaluated as it is mentioned here.

See also the topic Order of operators by the priority


Arithmetical operators

OperatorOperationDescriptionOperand typesResult type
+additionThe difference between two absolute times is calculated this way:
ATime - BTime = %SubTimeLocal(ATime, BTime)

All others combination of absolute and relative times with operators + and - are calculated this way:
ATime + RTime = %AddTimeLocal(ATime, RTime)

or

ATime - RTime = %AddTimeLocal(ATime, -RTime) 

integer
real
boolean
time interval
integer
real
boolean
time interval
Operand 1Operand 2
absolute timeinteger
real
relative time
integer
real
relative time
absolute time
absolute time
-subtractionThe difference between two absolute times is calculated this way:
ATime - BTime = %SubTimeLocal(ATime, BTime)

All others combination of absolute and relative times with operators + and - are calculated this way:
ATime + RTime = %AddTimeLocal(ATime, RTime)

or

ATime - RTime = %AddTimeLocal(ATime, -RTime) 

 
integer
real
boolean
time interval
integer
real
boolean
time interval
Operand 1Operand 2
absolute timeinteger
real
relative time
absolute time
*multiplication
integer
real
boolean
integer
real
integer
/division
integer
real
boolean
real
real
integer
-unary operator
integer
real
integer
real

In mathematical operations, operands of Boolean type are converted to Integer type as follows:

  • TRUE -> 1
  • FALSE-> 0

Note

  • The result of a function of Boolean type may be converted to other types by multiplying by a constant of the particular type. For example %Flag(Object,@A)*1 gives a numerical type of the result value, i.e. Integer, Real.


Logical operators

operatoroperationoperand typesresult type
&logical multiplicationboolean
integer
boolean
integer
|logical additionbooleanboolean
!negationbooleanboolean

Logical multiplication of two operands of INTEGER type represents a decadic form of logical multiplication performed between the corresponding bits of binary forms of both operands.

Example

179 & 217 = 145

10110011   179
11011001
217



10010001
145


Relational operators

operatoroperationoperand typesresult type
=equalinteger
real
absolute time
time interval
boolean
#unequalinteger
real
absolute time
time interval
boolean
>greaterinteger
real
absolute time
time interval
boolean
<less thaninteger
real
absolute time
time interval
boolean
>=greater or equalinteger
real
absolute time
time interval
boolean
<=less or equalinteger
real
absolute time
time interval
boolean

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