Final answer:
The strftime function is used to convert date and time values into strings. It can convert local time, UTC time, and custom time formats.
Step-by-step explanation:
The strftime function is a function in programming languages such as Python and C that is used to convert date and time values into strings. It takes a timestamp or a structure representing a date and time as input and returns a formatted string representing that date and time. The strftime function can convert various types of time, including local time, UTC time, and custom time formats.