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In C and C++, true is represented by any integer other than
0, and false is represented by 0. In such languages,
the value of the Boolean expression n != 0 is false if and
only if the value of n is 0.
Accordingly, the following while statement is legitimate in those
languages, but is not accepted by Java:
while (n) { // BUG! Will not work in Java!
...
}