Great question — figuring out the etymology of function names is such a smart way to lock them into memory, I totally get why you're asking!

strftime() originated in the C standard library, and its naming follows classic Unix/C abbreviation conventions:

• str = string: This function outputs a human-readable string as its result
• f = format: Its core job is to format raw time data into a custom string layout
• The trailing time obviously refers to the data type it operates on

Put it all together, and "strf" is just shorthand for string format — so the full name would be "string format time", which exactly describes what the function does: taking a time value and formatting it into a string.

内容的提问来源于stack exchange，提问作者Iswip