#### Functions

Functions must be imported from NumPy module. Among others:

- The array() built-in function: returns a numpy.ndarray from a list of elements (or list of lists,...), from a tuple (or tuple of tuples,...), or even from any valid numpy.ndarray. The array constructor also takes an optional dtype (see above), an optional savespace argument, and an optional copy argument (see below).
  Try also ones() or zeros() with a tuple containing dimensions as argument to create new arrays.

- The size() built-in function: displays the number of elements of the input array.

- The rank() built-in function: displays the number of dimensions of the input array (0 = scalar, 1 = vector, etc).

- The len() built-in function: displays the number of elements of the input array along the first dimension.

- See also: reshape().