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Re: "Abort Evaluation" does not work
On 8/18/10 at 7:07 AM, tmatsoukas at me.com (Themis Matsoukas) wrote: >I was hoping someone would answer your question because I too find >'Abort Evaluation' to work erratically. For example, the loop below >responds to 'Abort Evaluation': >i = 1; While[i <= Infinity, ++i] >..but this loop does not: >i = 1; While[i < 1000, Print[i]; ++i] I would have expected things to be just the other way around but wouldn't have thought to try either of these if there was a difference. But deliberately creating a loop that doesn't respond to Abort Evaluation isn't really something I want to do. But you post does make me wonder why things behave this way. Perhaps there is some level of error trapping present. It would be easy for a syntax checker to see a test checking a loop counter to be less than infinity will always be true. Suppose the first test were changed to i = 1; While[i < 1000, i--] It would still be an infinite loop but not so obvious as comparing i and infinity. Perhaps, this change makes a difference in the response to Abort Evaluation. And do note, I am speculating here rather than testing this.