Differences Between vbLf vbCrLf vbCr Constants

Question

I used constants like vbLf   vbCrLf  amp  vbCr in a MsgBox  it produces same output in a MsgBox  Text  Hai  appears in a first paragraph and a word  Welcome  appears in a next Paragraph    MsgBox  Hai   amp  vbLf  amp   Welcome   MsgBox   Hai   amp  vbCrLf  amp   Welcome   MsgBox  Hai   amp  vbCr  amp   Welcome     I know vbLf   vbCrLf  amp  vbCr are used for print and display functions   I want to know the Difference between the vbLf   vbCrLf  amp  vbCr constants

User · Accepted Answer

Constant   Value               Description  ----------------------------------------------------------------  vbCr       Chr 13              Carriage return  vbCrLf     Chr 13   amp  Chr 10    Carriage return   linefeed combination  vbLf       Chr 10              Line feed    vbCr   - return to line beginning Represents a carriage-return character for print and display functions  vbCrLf   - similar to pressing Enter Represents a carriage-return character combined with a linefeed character for print and display  functions  vbLf   - go to next line Represents a linefeed character for print and display functions      Read More from Constants Class

User · Answer

The three constants have similar functions nowadays  but different historical origins  and very occasionally you may be required to use one or the other   You need to think back to the days of old manual typewriters to get the origins of this  There are two distinct actions needed to start a new line of text    move the typing head back to the left  In practice in a typewriter this is done by moving the roll which carries the paper  the  carriage   all the way back to the right -- the typing head is fixed  This is a carriage return  move the paper up by the width of one line  This is a line feed    In computers  these two actions are represented by two different characters - carriage return is CR  ASCII character 13  vbCr  line feed is LF  ASCII character 10  vbLf  In the old days of teletypes and line printers  the printer needed to be sent these two characters -- traditionally in the sequence CRLF -- to start a new line  and so the CRLF combination -- vbCrLf -- became a traditional line ending sequence  in some computing environments   The problem was  of course  that it made just as much sense to only use one character to mark the line ending  and have the terminal or printer perform both the carriage return and line feed actions automatically  And so before you knew it  we had 3 different valid line endings  LF alone  used in Unix and Macintoshes   CR alone  apparently used in older Mac OSes  and the CRLF combination  used in DOS  and hence in Windows   This in turn led to the complications of DOS   Windows programs having the option of opening files in text mode  where any CRLF pair read from the file was converted to a single CR  and vice versa when writing    So - to cut a  much too  long story short - there are historical reasons for the existence of the three separate line separators  which are now often irrelevant  and perhaps the best course of action in  NET is to use Environment NewLine which means someone else has decided for you which to use  and future portability issues should be reduced

[vb.net] Differences Between vbLf, vbCrLf & vbCr Constants

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