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Message: [QUOTE="Justin C, post: 4866993"] Being self-taught this had passed me by (I'm not qualified to teach Perl you see, that's why my education was lacking this nugget - among others). OK. I can be certain that a user will never put in a number using more than two decimal places - if they do I can reject it. Would I be better off multiplying the input data by 100 and working in integars only? Then dividing by 100 only when I need the "real" number? It sure looks like it would make life easier. On the other hand, the sprintf trick works. Maybe I should just try and remember not to compare floats - that's obviously the best solution because it'll save me asking again in the future. Maybe, when I write my end of term report for myself, I should mention this, maybe I'll remember it when I read what my teacher says about me. Not *that* surprised. :) (at least, not after reading this thread!). Justin. [/QUOTE]