24.1.2  Computing with units

Xcas performs usual arithmetic operations (+, -, *, /, ^) on unit objects. Different units may be used, but for + and - they must be compatible. The result is an unit object.

• For the multiplication and the division of two unit objects _u₁ and _u₂, the unit of the result is written _(u₁· u₂) and _(u₁/u₂).
• For an addition or a subtraction of compatible unit objects, the result is expressed with the same unit as the first term of the operation.

Examples