Can You please explain this library usage

[Arjitc12]

https://github.com/bhavesh2699/Algorithms/blob/3f681bdea2c5b3b2e7269161077a50a47212e54c/Searching%20%26%20Sorting/Binary%20search.cpp#L3

[rdxmiles]

Hi,Arjit thanks for asking the question...actully #include<bits/stdc++.h> is library which contains set of all standard libraries.This is helpful when i don't know which libarary is to be included so I included one standard libarary which will include all libararies bydefault.
It can be seen a lot in online coding contest where we want to save time of including different header files.