Operators in expressions

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

arithmetical operators
logical operators
relational operators

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

Operator

Operation

Description

Operand types

Result type

+

addition

The 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

Operand 1	Operand 2
absolute time	integer real relative time
integer real relative time	absolute time

absolute time

-

subtraction

The 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

Operand 1	Operand 2
absolute time	integer real relative time

absolute time

*

multiplication

integer
real
boolean

integer
real
integer

/

division

integer
real
boolean

real
real
integer

-

unary operator

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

operator	operation	operand types	result type
&	logical multiplication	boolean integer	boolean integer
\|	logical addition	boolean	boolean
!	negation	boolean	boolean

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

1	0	1	1	0	0	1	1	179
1	1	0	1	1	0	0	1	217

1	0	0	1	0	0	0	1	145

Relational operators

operator	operation	operand types	result type
=	equal	integer real absolute time time interval	boolean
#	unequal	integer real absolute time time interval	boolean
>	greater	integer real absolute time time interval	boolean
<	less than	integer real absolute time time interval	boolean
>=	greater or equal	integer real absolute time time interval	boolean
<=	less or equal	integer real absolute time time interval	boolean