B4J Question Confusion about string and conversion

Discussion in 'B4J Questions' started by HARRY, Apr 7, 2015.

  1. HARRY

    HARRY Active Member Licensed User

    Hi,

    I am pretty new to Basic4Java and I have some basic questions:

    1) It is possible to add strings using Str1 + Str2. I know that is cleaner to add integers, but is should work?

    2) String1 & String2 is concatination . Right?

    3) Dim a as String
    Dim b as integer
    a=b & cr
    a stays empty, where as the value of b is 27 Why?

    Harry
     
  2. stevel05

    stevel05 Expert Licensed User

    This works as expected, using extra characters, you can see that the CRLF has been added.

    Code:
    Dim a As String
        
    Dim b As Int = 27
        a=b & 
    CRLF
      
        
    Log("*** " & a & " ***")
    Yes adding numeric values in strings will work provided they contain only numeric values, otherwise you will get a NumberFormat error.
     
  3. rwblinn

    rwblinn Well-Known Member Licensed User

    Hi,

    see example Subs

    Code:
    Sub AddStringsAsNumber(Str1 As String, Str2 As StringAs Double
        
    Dim result As Double
        
    If IsNumber(Str1) AND IsNumber(Str2) Then
            result = Str1 + Str2
        
    End If
        
    Return result
    End Sub

    Sub ConcatenateStrings(Str1 As String, Str2 As StringAs String
        
    Return Str1 & Str2
    End Sub

    Sub AddCRLF(b As Int) As String
        
    Return b & CRLF
    End Sub

    Sub Test
        
    Log("AddStringsAsNumber: " & AddStringsAsNumber("19""58"))   'Result = 77
        Log("ConcatenateStrings: " & ConcatenateStrings("19""58"))         'Result = 1958
        Log("AddCRLF: Line1" & AddCRLF(27) & "Line2")                             'Result Line127Line2 (on next line)
    End Sub
     
    ellpopeb4a likes this.
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