LBOUND (array, [,dim] [,kind])

  Class:  Inquiry function - Generic

  Returns the lower bounds for all dimensions of an array, or the
  lower bound for a specified dimension.

  The "array" cannot be an allocatable array that is not allocated,
  or a disassociated pointer.  The "dim" is a scalar integer with a
  value in the range 1 to n, where "n" is the rank of "array".  The
  "kind" must be a scalar integer initialization expression.

  The result is of type integer.  If "kind" is present, the kind
  parameter of the result is that specified by "kind"; otherwise, the
  kind parameter of the result is that of default integer.  If the
  processor cannot represent the result value in the kind of the
  result, the result is undefined.

  If "dim" is present, the result is a scalar.  Otherwise, the result
  is a rank-one array with one element for each dimension of "array".
  Each element in the result corresponds to a dimension of "array".

  If "array" is an array section or an array expression that is not a
  whole array or array structure component, each element of the
  result has the value 1.

  The setting of compiler options that specify integer size can
  affect the result of this function.

  Examples

  Consider the following:

  REAL ARRAY_A (1:3, 5:8)
  REAL ARRAY_B (2:8, -3:20)

  LBOUND (ARRAY_A) is (1, 5).  LBOUND (ARRAY_A, DIM=2) is 5.

  LBOUND (ARRAY_B) is (2, -3).  LBOUND (ARRAY_B (5:8, :)) is (1,1)
  because the arguments are array sections.