Visual Basic Tutorials

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VB6 - Understanding Basic String Operations

VB6 - Understanding Basic String Operations, Play with Words, Simple!

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Nikhil_07n
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25 Jan, 2009 - 07:11 AM

Post #1

The string Functions allows us to work with strings, as it's clear from their name.

1) Lcase and Ucase Functions

Explanation : Converts string to Lower and Upper case respectively.

Syntax :

CODE

LCase(String)

UCase(String)

Example :

CODE

Print Lcase("NiKhIl")

' The Output is : 'nikhil'

Print UCase("grEen")

' The Output is : 'GREEN'

2) Len Function

Explanation : Returns length of string, simple.

Syntax:

CODE

Len(String)

Example:

CODE

Print Len("Green Day")

'The Output is 9

3) Trim, Ltrim , Rtrim

(i) Trim - Removes Leading and trailing spaces.
(ii) Ltrim - Removes leading spaces.
(iii) Rtrim - Removes trailing spaces.

NOTE : all of these DO NOT effect spaces BETWEEN the words.

Syntax:

CODE

Ltrim(String)
Rtrim(String)
Trim(String)

Example:

CODE

Print Trim("   Beautiful Day     ")

'Output is 'Beautiful Day'

Print Ltrim("   Beautiful Day   ")

'Output is 'Beautiful Day   '

Print Rtrim("   Beautiful Day   ")

'Output is '   Beautiful Day'

'IMP: Carefully notice the spaces in OUTPUTs.

4) Left And right functions:

Explanation : Extracts some no. of characters from LEFTMOST and RIGHTMOST portion of a string respectively.

Syntax:

CODE

Left(String, Number-Of-Chars)
RIght(String, Number-Of-Chars)

Example:

CODE

Print Left("The Offspring Rocks",5)

' Output is 'The O'

Print Right("The Offspring Rocks",4)

'Output is 'ocks'

5)Mid Function

Explanation : Extracts some character from ANY portion of the string.

Syntax:

CODE

MID(String, Start-Position, Number-Of-Chars)

Example:

CODE

Print MID("Basket Case",3,2)

' The Output is 'sk'

6) Instr Fuction

Explanation : THis function searches string within strings, i.e., returns location of a string within string.

Syntax :

CODE

Instr(start-postion, string-in-which-searchin, string-to-search-for)

Explanation :

CODE

Print InStr(1, "Brain Stew", "ain")

' The OutPut is 3

7) Space Function

Explanation : Produces Number of Spaces, easy.

Syntax:

CODE

Space(no-of-spaces-to-be-generated)

Example:

CODE

Print "Hi" & Space(5) & "There"

'Output is 'Hi There'

8) String Function

Explanation : Generate particular no of characters.

Syntax :

CODE

String(number-of-times, character)

Example :

CODE

Print String(10, "A")

'The Output is 'AAAAAAAAAA'

9) Str Function

Explanation : Converts a number in equivalent string.

Syntax:

CODE

Str(number)

Example :

CODE

Print Str(-155)

'Output is "-155"

10) Asc Function

Explanation : Returns Ascii code of a character.

Syntax:

CODE

Asc(String)

Example:

CODE

Asc("F")

'Output is 70

Asc("Dessloch")

'Output is 68 as ascii code of "D" is 68

'NOTE: In multi charactered string, it prints ascii code of first letter without any error

10) StrReverse Function

Explanation : Returns the string, INVERTED.

Syntax:

CODE

StrReverse(String)

Example:

CODE

StrReverse("ABCD")

'Output is 'DCBA'

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whoa, lots of Typing!