code: def test_scalar():
      from sympy.vector import CoordSys3D
  
      C = CoordSys3D("C")
      v1 = 3 * C.i + 4 * C.j + 5 * C.k
      v2 = 3 * C.i - 4 * C.j + 5 * C.k
      assert v1.is_Vector is True
      assert v1.is_scalar is False
      assert (v1.dot(v2)).is_scalar is True
      assert (v1.cross(v2)).is_scalar is False
  
imports: from sympy.core import Rational, S
  from sympy.simplify import simplify, trigsimp
  from sympy.core.function import Derivative, Function, diff
  from sympy.core.numbers import pi
  from sympy.core.symbol import symbols
  from sympy.functions.elementary.miscellaneous import sqrt
  from sympy.functions.elementary.trigonometric import cos, sin
  from sympy.integrals.integrals import Integral
  from sympy.matrices.immutable import ImmutableDenseMatrix
  from sympy.vector.vector import Vector, BaseVector, VectorAdd, VectorMul, VectorZero
  from sympy.vector.coordsysrect import CoordSys3D
  from sympy.vector.vector import Cross, Dot, cross
  from sympy.testing.pytest import raises
label_desc: Use image node_id 13 for calling a global function with example usage: test_scalar() without return types