Grammar edited

276linesofCode · Aug 2, 2017 · 882c201 · 882c201
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 # Pull- Pins
 
-Suppose a pin is configures as an input. If nothing is connected to the pin and the program tries to read the state of the pin, it would need be in a 'floating' state i.e an unknown state. To prevent this, a pull-up or a pull-down state is defined. They are often used in the case of Buttons and Switches.
+Suppose a pin is configured as an input. If nothing is connected to the pin and the program tries to read the state of the pin, it would be in a 'floating' state i.e an unknown state. To prevent this, a pull-up or a pull-down state is defined. They are often used in the case of Buttons and Switches.
 
 Pins 2-7 on both the Ports are available for interrupts.