Using long datatype in if loop whats it use?

[jobin12345]

if ((long)(LCDtimer + 100) < millis())

[PaulRB]

Please read forum guide in sticky post.

[alto777]

Someone thought that they needed to cast LCDtimer + 100 to a long type to compare to another long type.

They did not need to do that. It means the same as

if (LCDtimer + 100 < millis())

Besides the fact that the proper unnecessary cast would have been to unsigned long, the return type of miils().

a7

[gfvalvo]

@jobin12345

if ((long)(LCDtimer + 100) < millis())

Bad code. Will fail on millis() rollover. Should use

  if(millis() - LCDtimer  > 100) {

[johnwasser]

@jobin12345

whats it use?

It's 'true' if it has been more than 100 milliseconds since LCDtimer was set to millis().