abs: The absolute value of a number (e.g. abs(-5) = 5). mod: From modulo. it's the operation to find the remainder of the division of one number by another. In python we use the symbol % (e.g. 5mod2 = ...

This is a simple GUI calculator built using Python and Tkinter. It performs basic arithmetic operations and also supports factorial (!) calculation. Click the number and operator buttons to form an ...