When do the rule apply?

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Hi, I guess this question is just a silly one for experts, but I can't
find the answer anywhere so I'm asking you guys.

In what order do the assigned rules apply in this script? 

# Example1
iptables -A INPUT -j DROP # rule #1
iptables -A INPUT --dport 80 -j ACCEPT # rule #2

#Example2 
iptables -A INPUT --dport 80 -j ACCEPT # rule1
iptables -A INPUT -j DROP # rule2

Will the both examples produce the same result?
Or will rule2 in example 2 make rule1 in example2 vanish because it's
telling the system to drop all?



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