variable str _'137 _'137

With this command, constants and new variables can be defined.

New variables are defined by combining existing variables through the following operations:

    ( ) + - * / ^ **

and intrinsic functions

    abs     acos    acosd   asin    asind   atan    atand   cos
    cosd    cosh    deg     exp     log     log10   rad     sin
    sind    sinh    sqrt    tan     tand    tanh

The definition string should look like, NEW : operation(OLD1,OLD2). Notice the assignment with ':'.

Constants are defined by a string like, PI=3.142 . Notice the assignment with '='.