Decrement in Java [closed]

Answer 1

try

result=--result; it will print 4, and you will come to the understanding of what is the diffrence between c-- and --c

Answer 2

Very valid question!

Your code doesn't work since result-- is performed only after the substitution =. Your code would work had you used prefix operator:

result = --result;

However that doesn't make any sense as you can simply write:

--result;

For a more thorough explanation see this question/answers on how prefix/postfix operators work on Java.