9.3.2  Initializing the random number generator: srand randseed RandSeed

The srand and RandSeed commands initialize (or re-initialize) the random numbers given by rand.
randseed is a synonym for srand.

• srand takes one optional argument:
  Optionally, n, an integer.
• srand(n) initializes the random numbers.
• srand (no parentheses) initializes the random numbers using the system clock.

• RandSeed takes one argument:
  n, an integer.
• RandSeed(n) initializes the random numbers.