__Error____ messages__

The
display errors area is below the main display.

Here is the list of error messages:

- «symbol» can't follow!

The symbol can
not follow the one preceding.

Example : 4+x

The symbol of the
multiplication can not follow
the symbol of addition.

- «symbol» can't start the formula!

The symbol can
not begin the formula.

Example : x

The multiplication symbol needs a value before.

- Too many =!

There can be only one =, to save a value or the result of the
formula in a variable, or to complete the formula.

- Too many signs in the exponent!

There can be
only one negative sign for a exponent.

- Too many zeros!

- Too many zeros in the exponent!

The symbol is
not significant.

- Too many points!

- Too many points in the exponent!

There can be only one decimal
point in a number.

- Only variables here!

Only variables can receive the result of the calculation of the formula.

- Need a ( before!

A closed parenthese
request an open parenthese
in the formula.

- Need a ) somewhere!

An open parenthese request
a closed parenthese
in the formula.

- Exponent -1 for
inverse trigo functions!

Trigonometric functions accept
only the exponent -1 to
reverse the function.

- Need a √ after a exponent!

Only
a root sign can follow an exponant.

- The formula is complete!

The
formula is complete when the result is stored in a variable.