Casio fx-50F Manual De Usuario

E-57

E

(Prompt for input for variable  

)

Input 8 for variable  

:

8E

Input 5 for variable  

:

5E

Input 5 for variable  

:

5E

• As shown above, the calculation result appears after you assign values to all of the 

required variables. 

• Pressing  

E while a calculation result is on the display will re-execute the formula from 

the beginning. 

A Special Built-in Formula Variables (Formula Variables) 

When you perform a calculation using a built-in formula, you assign values to the variables 
of the formula and calculate the result. In addition to the  

,

, and

 variables we saw 

in Heron's formula above, there are also variables named  

,

,

,

ρ , and

. Since these 

variables are used only in built-in formulas, they are called formula variables. 
Values you assign to formula variables when you perform a calculation with a built-in 
formula are retained until you change to another calculation mode, perform a memory clear 
operation ( 

19(CLR)1(Mem)), or reset the calculator ( 19(CLR)3(All)). This 

means that you can execute a built-in calculation multiple times leaving one or more of the 
variables assigned with the same values as a previous execution, if you want. 
Pressing

E after performing the operation under “Performing Calculation with a Built-in 

Formula” will display the variable assignment screen again, with the previously assigned 
values as the initial defaults. 

Prompt for input for variable  

Value previously assigned to variable  

If you want to leave the displayed value assigned to the variable, press  

E. In this case, 

pressing

E will leave 8 assigned to variable  

.

Even if you select a different built-in formula, all variables that have the same names as the 
previously used formula will retain their current values.