Answer: single
Explanation:
Char value are basically surrounded by the single quotes. Char is basically as character value, which hold the one and more characters in a single quotes by using different data type.
It basically store the character data with fixed length. And we can use the single and multi-byte characters to store the values in the character columns.
For example: 'P' and '8' , these are the examples of character value which are surrounded by using single quotes.