Say you use the rand command to generate random numbers. I want to create pairs of numbers by randomly picking two numbers from an array of 100 elements. If I pick a number from 1 to 100 for the 1st of the pair, how do I prevent the rand from picking the element again for the 2nd number of the pair? And how do I prevent a repeat interaction?

In reply to biased random number picking by Anonymous Monk

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