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Infinite loop
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===Impossible termination condition=== An example [[for loop]] in [[C (programming language)|C]]: <syntaxhighlight lang="c"> unsigned int i; for (i = 1; i != 0; i++) { /* loop code */ } </syntaxhighlight> It appears that this will go on indefinitely, but in fact the value of <code>i</code> will eventually reach the maximum value storable in an <code>unsigned int</code> and adding 1 to that number will wrap-around to 0, breaking the loop. The actual limit of <code>i</code> depends on the details of the system and [[compiler]] used. With [[arbitrary-precision arithmetic]], this loop would continue until the computer's [[memory (computers)|memory]] could no longer hold <code>i</code>. If <code>i</code> was a signed integer, rather than an unsigned integer, overflow would be undefined. In this case, the compiler could optimize the code into an infinite loop.
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