But, as the program gets bigger, more libraries are used, the run time exceeds and becomes quite noticeable. The complexity! One specific line of the loop function keeps on checking inputs over and over again right when that line is being executed (We call it “polling”).
In the setup function, we commend the chip to do the initial works at once and then in the loop the chip repeats checking for events and act as coded. In a practical sense, we usually go with the expensive microcontrollers instead of analog components when want to read values and take decisions based on the data coming from sensors and such. The setup function and the loop function. As we all know, the Arduino has 2 basic functions.
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