Using Variables - Sharp EL-5230 Operation Manual

Chapter 1: Before You Get Started

Using variables

You can use 27 variables (A-Z and θ) in the NORMAL mode. A number
stored as a variable can be recalled either by entering the variable name or
using t.
Example 1
3
Store 2 to variable R.
Press j 2 1 then x.
1.
• j clears the display.
• ALPHA appears automatically when you
press x. You can now enter any
alphabetic character or θ (written in blue
above keys in the keypad).
2. Press R to store the result of 2
• The stored number is displayed on the
next line.
• ALPHA disappears from the display.
You can also store a number directly
rather than storing the result of an expression.
Example 2
Find the area of a circle which has radius R.
Enter an expression containing variable R (now equal to 8) from the last
example.
Press j @ s then ;.
1.
• Whenever you need to use a character
written in blue on the keypad, press
; beforehand. ALPHA will appear at
the above of the display.
Press R and then A.
2.
• ALPHA disappears after you have
entered a character.
18
NORMAL MODE
2„Ò_
3
in R.
2„ÒR
NORMAL MODE
π_
NORMAL MODE
πRŒ_
0.
0.
8.
r
S = πr
2
0.
0.