Question

what is RND and its functions​

Answer 1

Research and development (R&D) includes activities that companies undertake to innovate and introduce new products and services. It is often the first stage in the development process. The goal is typically to take new products and services to market and add to the company's bottom line.

Answer 2

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The RND function returns a sequence of random numbers. The sequence of values returned is determined by a "seed value." The same sequence results each time a given seed is used. This is typical of most random number functions in other languages. Such a value can be multiplied and scaled to any desired range.