Campbell CR800 Series - Concatenation of Numbers and Strings

Section 7. Installation
305
Concatenation of Numbers and Strings
'This program example demonstrates the concatenation of numbers and strings to variables
'declared As Float and As String.
'
'Declare Variables
Public Num(12) As Float
Public Str(2) As String
Dim I
BeginProg
Scan(1,Sec,0,0)
I = 0 'Set I to zero
'Data type of the following destination variables is Float
'because Num() array is declared As Float.
I += 1 'Increment I by 1 to clock through sequential elements of the Num() array
'As shown in the following expression, if all parameter are numbers, the result
'of using '+' is a sum of the numbers:
Num(I) = 2 + 3 + 4 '= 9
'Following are examples of using '+' and '*' when one or more parameters are strings.
'Parameters are processed in the standard order of operations. In the order of
'operation, once a string or an '&' is processed, all following parameters will
'be processed (concatenated) as strings:
I += 1
Num(I) = "1" + 2 + 3 + 4 '= 1234
I += 1
Num(I) = 1 + "2" + 3 + 4 '= 1234
I += 1
Num(I) = 1 + 2 + "3" + 4 '= 334
I += 1
Num(I) = 1 + 2 + 3 + "4" '= 64
I += 1
Num(I) = 1 + 2 + "3" + 4 + 5 + "6" '= 33456
I += 1
Num(I) = 1 + 2 + "3" + (4 + 5) + "6" '= 3396
I += 1
Num(I) = 1 + 2 + "3" + 4 * 5 + "6" '= 33206
I += 1
Num(I) = 1 & 2 + 3 + 4 '= 1234
I += 1
Num(I) = 1 + 2 + 3 & 4 '= 64
'If a non-numeric string is attempted to be processed into a float destination,
'operations are truncated at that point
I += 1
Num(I) = 1 + 2 + "hey" + 4 + 5 + "6" '= 3
I += 1
Num(I) = 1 + 2 + "hey" + (4 + 5) + "6" '= 3
'The same rules apply when the destination is of data type String, except in the
'case wherein a non-numeric string is encountered as follows. Data type of the