sprintf() in C

Syntax: 

int sprintf(char *str, const char *string,...); 

Return: 

If successful,
it returns the total number of 
characters written excluding 
null-character appended in the string, 
in case of failure a negative number 
is returned .

sprintf stands for “String print”. Instead of printing on console, it store output on char buffer which are specified in sprintf.

Sum of 10 and 20 is 30

Time Complexity: O(n), where n is the number of elements being stored in buffer.
Auxiliary Space:  O(n), where n is the number of elements being stored in buffer.