About Character Literals
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About Character Literals
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A character literal is any string of characters enclosed in quotation marks as shown in the following example:
'This is a character string.' "This is a character string, too."
For convenience, you can enter character literals without the delimiting quotation marks; however, quotation marks are required in some situations. The rules for using quotation marks are described in Quotation Marks.
Valid and Invalid Literals
The following are examples of valid literals:
‘abc’ | Is a character string. |
‘ab”C’ | Is a character string. |
” | Is a null string. |
3.14159 | Is a number literal. |
9 | Is a number literal. |
‘10.99’ | Is a character string. |
‘John’s toy boat’ | Is a character string. |
‘ABCd_EfG’ | Is a character string. |
‘1234A’ | Is a character string. |
The following are examples of invalid literals:
1 23 | Spaces are not permitted in number literals. |
$10.99 | Periods are not permitted in an unquoted character string, and the dollar sign is not permitted in a number literal. |
‘John’s toy boat’ | ‘John’ is a valid character string, but the rest of the line is invalid. |
Updated
ByJason Lee
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