Why int main is used in c?

In C, main is the designated entry point for any program. It's the very first function that gets called when you execute the code. The int specifies that the function returns an integer value. This value acts as a status code for the operating system. A return value of 0 conventionally means success. Any other number typically indicates an error occurred. It's how your program communicates its final state back to the system that ran it.