How does the rand() function in Excel generate random numbers?
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How can a function defined in a programming language generate a random number? If there is an algorithm defining that function, then the number generated cannot be truly random. Right? The answer need not have many technical details, just the logic behind generating a truly 'Random' number.
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Answer:
It is impossible for the computer to generate truly random numbers. What are typically generated are pseudo-random numbers. See http://en.wikipedia.org/wiki/Random_number_generation#.22True.22_random_numbers_vs._pseudo-random_numbers for the difference between the two. What is used, therefore, is a http://en.wikipedia.org/wiki/Pseudorandom_number_generator. For some crude and readily accessible ones, see http://en.wikipedia.org/wiki/Random_number_generation#Computational_methods.
Prasham Rambhia at Quora Visit the source
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