The ASC function is one of the text and data functions. Is used to change full-width (double-byte) characters to half-width (single-byte) characters for languages that use the double-byte character set (DBCS) like Japanese, Chinese, Korean, etc.
Syntax
ASC(text)
The ASC function has the following argument:
Argument
Description
text
The text or a reference to a cell containing the text you want to change. If the text does not contain full-width characters it remains unchanged.