1

In below statement we will get unreachable statemnt error. I know what is the reason behind that error.

for(;false;)
System.out.println("Unrechable statement");

My question is why we'll not get error in below statemnt.

boolean b = false;
for(;b;)
System.out.println("NO error");
Afsar edrisy
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Rahul singh
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  • Related - https://stackoverflow.com/questions/14000930/unreachable-statement-error-using-while-loop-in-java – nehacharya Feb 29 '20 at 05:03

1 Answers1

4

The reason is compiler will consider that there may be a chance that b is being changes from its previous value to some other value by some other part of your program or thread, Even though your program is not actually changing b but compiler will not detect it at compile time. Clarification could be just make b as final & see you will get the same error because compiler will notice that b is final & can not be changed by other part of program so will consider false as final value of b & thus will produce error . 

final boolean b = false;
for(;b;)
System.out.println("NO error"); //error: unreachable statement
Afsar edrisy
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