Conditional Structures and Loops - A Concise and Practical Introduction to Programming Algorithms in Java - page 47

usually used in plain assignments, they also make perfect sense as illustrated
by the program below:

Program 2.8 Boolean arithmetic expression
class Boolean {
public static void main( String [ ] args )

boolean b1 = (6 − 2) == 4;
boolean b2 = 22/7 == 3+1/7.0 ;
boolean b3 = 22/7 == 3+ 1/7;
System . out . println (b1) ; // true
System . out . println (b2) ; // false
System . out . println (b3) ; // true
}
}

2.5 Unfolding loops and program termination

2.5.1 Unfolding loops

When executing a program that contains loop structures, we can unroll these
loops manually. Compilers actually do it sometimes to optimize the generated
bytecode.

2.5.2 Never ending programs

Once programmers first experience loops, a major issue arises: Does the
program terminate? It is indeed quite easy to write never ending programs
by writing loops that execute forever as illustrated below:

int i=0;
while (true)
i++;

Always make sure when you write a for structure that the boolean expression
will evaluate to false at some stage. Take care to avoid mistyping problems
such as:
for(i=0;i>=0;i++)
; // common mistyping error in the boolean predicate
... and prefer to use curly brackets instead of the semi-colon for single-
instruction blocks: