# Floating Point Modes

The floating-point keypad is designed to be as familiar as possible, while presenting features not found on most production handheld calculators. The buttons are listed below, together with a description of their intended use:

• , : For inputting decimal digits, the maximum recognized accuracy for Floating Point mode is 15 digits (100 digits for Floating Multiprecision).
• : Insert a decimal point, a preceding is required when entering a number less than ±1.
• , , , : Standard arithmetic operators, with multiplication and division having a higher precedence than addition and subtraction. Negative numbers can be entered by preceding them with .
• : Calculate square root of the immediately preceding value.
• : Raise the preceding value to the power of the following value, sometimes called index or exponent operator (shown as ^). This operator has a higher precedence than multiplication and division.
• : Change the order of magnitude of the preceding value, usually followed by a positive or negative integer. This key is often labeled EXP on production calculators.
• : Convert the preceding number to a percentage. Note that entering 20% is exactly the same as entering (20/100) and this operator has the highest precedence.
• , : Introduce sub-expressions of higher precedence. Note that on pressing the sub-expression is evaluated and shown as the running result.
• : Separate parameters when entering functions (see below), not possible to be used any other way.
• : Evaluate the current expression and place the result immediately above it. In case of evaluation failure, an error code beginning ERRxx is shown and the current expression remains editable.
• : Paste the result of the previous calculation into the current calculation. Note that this is the same as a long press on the same result in the display.
• : Delete the last element of the current calculation, unless has been pressed and the result is not an error.
• : Erase (clear) the current calculation and display 0 as the running result.

### Constants

The Constants Menu is opened by pressing e, π on the menu bar. Choosing an item from this menu pastes the selected constant into the current expression and closes the menu; a constant can be used anywhere a numerical value is valid. Having selected a constant, the running result changes to show its actual value; the selected constant is also placed in the recent history of the mode’s constants menu.

### Functions

The Functions Menu is opened by pressing f(x) on the menu bar. Choosing an item from this menu begins entry of the selected function at the end of the current expression (with an opening parenthesis) and closes the menu. Parameter(s) can be numbers, expressions, constants from the Constants Menu, or the result of other functions from the Functions Menu. For functions taking more than one parameter the key needs to be used to delimit them. Usage of the key is only possible when the correct number of parameters have been entered, and the result of the function is displayed as the current result until further input is entered or pressed.