CHARGRAPHIC converts a GRAPHIC (DBCS) string x to a mixed character string with a length specified by y.
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Abbreviation: CHARG
x must be a GRAPHIC string. CHARACTER returns x converted to a mixed character string.
If y is omitted, the length is determined by the rules for type conversion.
y cannot be negative.
If y = 0, the result is the null character string.
The following rules apply: