Metrohm tiamo 1.0 Manual - Manual (Page 56)

32 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.