Arduino base parking system - Simple Arduino Based Automated Parking Lot System - page 41

setup() function
As you know, this function is run once time in the program. The following activities are
performed by this function:
1. It configures input and output pins of Arduino board by pinMode instruction.
2. It reads the capacity of parking lot from EEPROM.
3. Reads the time from RTC IC
After setup function , the program will go into loop function . The program will stay in the
loop function and recall some functions, as explained in the following sections.