HP 32SII - Manual (Page 103)

Entering and Evaluating Equations 6–15
File name 32sii-Manual-E-0424
Printed Date : 2003/4/24 Size : 17.7 x 25.2 cm
To leave the number unchanged, just press f .
To change the number, type the new number and press f .This
new number writes over the old value in the X–register. You can enter a
number as a fraction if you want. If you need to calculate a number, use
normal keyboard calculations, then press
f . For example, you can
press 2 š 5 0 f .
To calculate with the displayed number, press š before
typing another number.
To cancel the prompt, press † . The current value for the variable
remains in the X–register. If you press † during digit entry, it clears the
number to zero. Press † again to cancel the prompt.
To display digits hidden by the prompt, press {  .
Each prompt puts the variable value in the X–register and disables stack lift. If
you type a number at the prompt, it replaces the value in the X–register.
When you press
f , stack lift is enabled, so the value is retained on the
stack.
The Syntax of Equations
Equations follow certain conventions that determine how they're evaluated:
How operators interact.
What functions are valid in equations.
How equations are checked for syntax errors.
Operator Precedence
Operators in an equation are processed in a certain order that makes the
evaluation logical and predictable: