Free calculator that allows you not only to perform simple calculations such as adding, subtracting, multiplying, dividing, etc., but also to calculate whole expressions such as sin(cos(tan(pi)))+e^3 or floor((19+34/3)^3#2)%15 using brackets, trigonometric functions, mathematical constants, elements (symbol "#") and lifting to power ("^"). The Prompter calculator has a built-in error detection system (e.g. no brackets, unknown symbol).

Due to the specificity of the program, it does not have an interface with numeric buttons, multiplication, division, etc., and all operations should be entered manually.