Operators - logic – Metrohm tiamo 1.0 Manual User Manual
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General program functions
Operators - Logic
AND
Syntax
Operand1 AND Operand2
The operands can either be entered directly or as a Variable and can be
of the type
Text
,
Number
or
Date/Time
. The result type is always a number (
1
= true,
0
= false). The following cases are possible:
Operand1
Operand2
Result
1
1
1
0
1
0
1
0
0
0
0
0
Examples
Operand1 Operand2 Result
Example
Remarks
Operands of the same type:
Number Number Number
5 AND 4 --> 1
4 AND 0 --> 0
Numbers larger than 0 are interpreted as
1
(true).
Text Text Number
"Metrohm" AND "AG" -->
1
"" AND "AG" --> 0
An empty character string (
""
) is inter-
preted as
0
(false), everything else as
1
(true). This means that the first operation
corresponds to
1 AND 1 --> 1.
Time Time Number
Time(1999;10;07) AND
Time(1999;10;07) --> 1
Time()
: see function Time(Date)
Operands of different types:
Number Text
Number
1.2 AND "1.2" --> 1
0 AND "1" --> 1
0 AND "0" --> 1
0 AND "" --> 0
Before the operation an operand of the
type
Number
is converted to the type
Text
,
as the conversion from
Text
to
Number
makes no sense. This means that in the 2
nd
operation the 0 is converted to
"0"
, which
corresponds to the logical value
1
(true) as
every non-empty character string is inter-
preted as 1.
Text Number
Number
"Metrohm" AND 1.2 --> 1
The same rules apply here as for the pre-
vious operation.
Number Time
Number
2.0 AND Time(1999;10;7)
--> 1
0 AND Time(1999;10;07)
--> 0
Before the operation an operand of the
type
Date/Time
is converted to the type
Number
; all dates from 30 December 1899
are interpreted as
1
(true).
Time Number
Number
Time(1999;10;7) AND 2.5
--> 1
The same rules apply here as for the pre-
vious operation.
Text Time Number
"Metrohm" AND
Time(1999;10;7) --> 1
"" AND Time(1999;10;07)
--> 0
Before the operation is carried out an op-
erand of the type
Date/Time
is converted
to the type
Text
and each non-empty
character string is interpreted as
1
(true).
Time Text Number
Time(1999;10;7) AND
"Metrohm" --> 1
The same rules apply here as for the pre-
vious operation.