Final answer:
In old_style print formatting in Python, the conversion flag %c is used to output a single character.
Step-by-step explanation:
When using old_style print formatting with the % in Python, the conversion flag that outputs a single character is %c. For instance, if we have a value of 65, using the %c format specifier would output 'A' because in ASCII representation, 65 corresponds to 'A'.
On the other hand, %d is used for integers, %s for strings, and %x for hexadecimal representation.
Learn more about old_style print formatting