Is scanf () function automatically allocate space for null terminator like fgets()? In C

Question

|| Otherwise we have to manually allocate a space for null terminator in scanf() while handling with strings....?
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Answer 1

Neither scanf() nor fgets() allocate space for input strings and NULL terminators. The caller must provide pre-allocated memory space for string input, and yes, be certain to have a spare byte to accept the terminating NULL when calling either function.