adds a variable of name nameCalc syntaxes addVariable(nameCalc, val, min, max, step) and `addVariable(nameCalc, val, min, max, step, dialog) are allowed too
addVariable(nameCalc, val, min, max, step)
Optional
true to associate to the variable a pane with buttons +, - and =
maxi value of the variable
mini value of the variable
Name of the variable to be created
step value of the variable
current value of the variable
adds a variable of name nameCalc syntaxes
addVariable(nameCalc, val, min, max, step)and `addVariable(nameCalc, val, min, max, step, dialog) are allowed too