What is main function ?

The main() is a function. Every program contain main() function. The main() function indicates the starting of the program i.e. a program started with a main function.
Every program should have at least one main function. The main() function can be declared in different ways, for example:

• main()
• void main()
• int main()
• void main(void)
• int main(void)
• main(void)