Anyone can make program to compare to number to operate relay

Using Arduino Programming Questions
#1

Anyone can make program to compare two numbers
.and if variable value exceed contstant value then relay come into low state

#2 
if(variable > constant) relay_state = LOW;
#3

DKWatson:

if(variable > constant) relay_state = LOW;

Or, more directly:

  if (variable > Constant) digitalWrite(RelayPin, LOW);

(I use initial capitals to help me keep track of which identifiers are global and which identifiers are local.)

#4

Fair enough. Either solution though, fits with the rest of the code.

#5