Question

what is the following (ARDUINO):

-The digitalRead function

-The correct setup for the “for” / “for next loop” control:

- The analogWrite function can be used to

-Serial.print() will display information on

Answer 1

• digitalRead(pin) reads the value from a specified digital pin (argument of the function) and returns either a HIGH or LOW. If the mentioned pin is not connected to anything the value returned by the function is not reliable - can be HIGH or LOW randomly.
• For loop does not require any setup. The syntax for the function is as follows:

for(initialization; condition; increment)

{ // statements; }

'for next' loop is present as part of visual basic and not in Arduino.

• analogWrite(pin, value) writes an analog value to the specified pin (which should be of integer data type). The parameter value specifies the duty cycle and can take integer values between 0 (always OFF) and 255 (always ON). It does not return any value and when it is called it generates a steady square wave of the specified duty cycle on the specified pin until other read/write functions on the same pin are called.
• Serial.print(val, format) will give data (in the parameter val) to the serial port and thus, the device connected to the corresponding serial port will display the data. The second parameter of the function is optional and specifies the format of the data to be passed to the serial port.