Progress
Language Reference
CHR Function
Converts an integer value to its corresponding character value.
SYNTAX
expression
An expression that yields an integer value that you want to convert to a character value.
If the value of expression is in the range of 1 to 255, CHR returns a single character. This character might not be printable or might not display on certain terminals. For a value greater than 255 and less than 65535, the CHR function checks for a corresponding lead-byte value. If the integer value corresponds to a valid lead-byte, the CHR returns a double-byte character.
The CHR function returns a null string if the expression yields a value outside of the range 1 to 65534 or the expression yields a value in the range 256 to 65534 and the value does not correspond to a valid lead-byte.
target-codepage
A character-string expression that evaluates to the name of a code page. The name that you specify must be a valid code page name available in the
DLC/convmap.cp
file (a binary file that contains all of the tables that Progress uses for character management). If you supply a non-valid name, the CHR function returns a null string. Before returning a character value, the CHR function converts expression from source-codepage to target-codepage. The returned character value is relative to target-codepage. If you do not specify target-codepage, no code page conversions occur.source-codepage
A character-string expression that evaluates to the name of a code page. The name that you specify must be a valid code page name available in the
EXAMPLEDLC/convmap.cp
file. If you supply a non-valid name, the CHR function returns a null string. The source-codepage specifies the name of the code page to which expression is relative. The default value of source-codepage is the value of SESSION:CHARSET.This procedure initializes the 26 elements of the letter array to the letters A through Z.
NOTES
- The CHR function returns the corresponding character in the specified code page. By default, the value of SESSION:CHARSET is iso8859-1. You can set a different internal code page by specifying the Internal Code Page (-cpinternal) parameter. For more information, see the Progress Startup Command and Parameter Reference.
- The CHR function is double-byte enabled. For a value greater than 255 and less than 65535, it checks for a lead-byte value. If the lead-byte value is valid, Progress creates and returns a double-byte character.
SEE ALSO
ASC Function, CODEPAGE-CONVERT Function, SESSION System Handle, STRING Function
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