Important Notice

The pages on this site contain documentation for very old MS-DOS software, purely for historical purposes. If you're looking for up-to-date documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.

  ◄Programming Tasks►   ◄String Manipulation►   ◄Contents►   ◄Index►
──────────────────────────────────────────────────────────────────────────────
Statements and Functions Used for String Manipulation
 
                        Statement or
Task                    Function                        Action
 
Getting part of         LEFT$              Returns a given number of
a string                                   characters from the left side
                                           of a string
 
                        RIGHT$             Returns a given number of
                                           characters from the right side
                                           of a string
 
                        LTRIM$             Returns a copy of a string with
                                           leading blank spaces stripped
                                           away
 
                        RTRIM$             Returns a copy of a string with
                                           trailing blank spaces stripped
                                           away
 
                        MID$(function)     Returns a given number of
                                           characters from anywhere in a
                                           string
 
Searching strings       INSTR              Searches for a string within
                                           another string
 
Converting to           LCASE$             Returns a copy of a string with
uppercase or                               all uppercase letters (A-Z)
lowercase                                  converted to lower-case letters
letters                                    (a-z); leaves lowercase letters
                                           and other characters unchanged
 
                        UCASE$             Returns a copy of a string with
                                           all lowercase letters (a-z)
                                           converted to upper-case letters
                                           (A-Z); leaves uppercase letters
                                           and other characters unchanged
 
Changing strings        MID$(statement)    Replaces part of a string with
                                           another string
 
                        LSET               Left justifies a string within
                                           a fixed-length string
 
                        RSET               Right justifies a string within
                                           a fixed-length string
 
Converting numbers to   STR$               Returns the string representation
strings, and strings                       of the value of a numeric
to numbers                                 expression
 
                        VAL                Returns the numeric value of a
                                           string expression
 
Converting numbers      CVtype             Changes numbers stored as strings
to data-file strings                       back to Microsoft Binary format
and data-file strings                      numbers in programs working with
to numbers                                 random-access files created with
                                           older versions of BASIC
 
                        CVtypeMBF          Changes numbers stored as
                                           Microsoft Binary format strings
                                           to IEEE-format numbers
 
                        MKtype$            Changes Microsoft Binary format
                                           numbers to strings suitable for
                                           storing in random-access files
                                           created with older versions of
                                           BASIC
 
                        MKtypeMBF$         Changes IEEE-format numbers to
                                           Microsoft Binary format strings
 
Creating strings of     SPACE$             Returns a string of blank
repeating characters                       characters
 
                        STRING$            Returns a string consisting of
                                           one repeated character
 
Getting the length      LEN                Tells how many characters are
of a string                                in a string
 
Working with            ASC                Returns the ASCII value of the
ASCII values                               given character
 
                        CHR$               Returns the character with the
                                           given ASCII value