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The function millis ( ) returns an unsigned long integer equal to the number of milliseconds since the last time the Arduino board was started
The function millis returns an unsigned long integer equal to the number of
milliseconds since the last time the Arduino board was started ie since a program
was downloaded or the board was powered up or the reset button was hit. If the
length of time exceeds the number of milliseconds that can be stored in an unsigned
long integer, then the returned value will "rollover" to and you will not get an
accurate answer in the calling program.
a What is the longest duration of time that can be accurately determined if you
call millis like this:
unsigned long millis ;
Express your answer in whatever unit is appropriate minutes, hours, days,
etc.
b How would your answer to a change if you called millis like this:
int millis ;
c Redo parts a and b but this time for the function micros which reports
the time duration in microseconds.
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