java - Infinite loop value -


what initial values of x make loop infinite? told answer 123, don't understand how. can explain this?

do  {    x = x - 3; }  while (x < 120);

no value cause loop infinite loop. in java, integral primitive values underflow positive number, , loop end.

as example: 

int x = integer.min_value;  {     x = x - 3;      system.out.println(x); } while (x < 120);

will output: 

2147483645

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