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Message: [QUOTE="Roedy Green, post: 628357"] You can't use the while count idiom twice in a row since you can't redeclare the index variable in the same scope. There is also the general rule that it is best to narrow the scope of a variable to the absolute minimum. Making it overly broad just creates opportunities for unintended interactions, or other uses being overlooked in maintenance. And for those not afraid of Knuth, it suppresses various optimisations, such as putting an indexing value purely in a register. [/QUOTE]