**Quick Tricks: Casio Programming Calculators and webcal.freetzi.com**

The website is in Chinese (I believe) and I am grateful for
Google Translate because I am not proficient in Chinese.

On this page advanced programs for the fx-3650p including:

* Gamma Function, Elliptic Functions (for x<1), Beta,
Zeta, and other special functions

* Determinant of a 3 x 3 Matrix

* Squaring a square matrix

* 4 and 8 point Fast Fourier Transform

* Geometry: Distance
from a point to a line, area from a set of vertices

* Prime Factorization

* Engineering Programs: Snell’s Laws, Prism, Ohm’s law

* Days between Dates, Day of the Week

If you have a Casio programming calculator, check this
awesome website out.

While I was learning to code the programs myself, I notice
there were several tricks that were used to save space. I want to test the tricks for the Casio
fx-5800p and Casio fx-9860GII (Linear Input Mode). The case for the fx-9860GII should be the
same for other modern Casio graphing calculators (9750g, Prizm).

**Quickly Setting X = 1 and Y = 0**

Syntax: Pol(1,0)

Calculators:
fx-3650p only

Note: Pol(1,0) sets I to 1 and J to 0 for the fx-5800p.

Note: Pol(1,0) sets I to 1 and J to 0 for the fx-5800p.

**The Power of Implied Multiplication**

Most Casio programming calculators have only single-letter
variables, which allows for implied multiplication. For example, typing AB multiples the values
stored in A and B. In the examples
listed below, I use variables A and B, but it applies to all the other
variables.

**Implied Multiplication and Square Root**

Syntax: √AB

What it calculates: √(A*B)

Calculators: fx-3650p, fx-5800p, fx-9860GII

Example: A = 5, B =
10; √AB returns 7.071067812 (√50)

**Implied Multiplication and Powers**

Syntax: n^AB

What it Calculates: (n^A)*B

Calculators: fx-3650p, fx-9860GII (linear input only)

Example: 2^AB where A
= 5, B = 10; 2^AB returns 320 (2^5*10)

**The Jump Function Shortcuts**

**If the Expression is Nonzero**

Syntax:
(var/expression) ⇒ (execute this statement of
var/expression ≠ 0) : (next command)

The next command must exist or an error occurs

Calculators: fx-3650p,
fx-5800p, fx-9860GII

Example: Ask for A and B.
Divide A by B, unless B is 0.

Prog2

? → A: ? → B: B ⇒ A ÷ B: Ans

A = 13.5, B = 2.7, result is 5

A = 13.5, B = 0, result is whatever is last stored in Ans

**Using the Jump Function to create an AND condition**

Connecting two or more jump functions (⇒)
to create an AND condition.

Syntax – 2 Conditions:

(condition 1) ⇒ (condition 2) ⇒
(do if conditions 1 and 2 are true) : (next command)

Syntax – 3 Conditions:

(cond 1) ⇒ (cond 2) ⇒ (cond 3) ⇒
(do if all three conditions are 3) : (next command)

Example: Calculate the eccentricity of an ellipse, assuming
A ≥ B. If anything improper is entered,
-1 is returned.

Prog3

? → A: ? → B: -1 → C: A ≥ B ⇒ A > 0 ⇒ B > 0 ⇒
√(1 – B

^{2}/A^{2}→ C: C
A = 11.5, B = 3.6, result 0.949738796

A = 6, B = 8, result -1

A = -2, B = 1, result -1

**Independent Memory**

M+: Calculate the
expression, add to M and store the result to M

M-: Calculate the
expression, subtract from M and store the result to M

Syntax: (expression)
M+, (expression) M-

Calculators: fx-3650p, fx-5800p.

Note: This should
work on any Casio calculator with M+ and M- available on the keyboard.

Example:

Store 7 in M.

3^2 + 4 M+ returns 13 in the display, with M = 20

2^3 – 1 M- returns in the display, with M = 13

**Absolute Value**

Does you calculator not have an absolute value
function? Try this trick:

Syntax: √A

^{2}
What it calculates: |A|

Calculators:
fx-3650p, fx-5800p, fx-9860GII

Examples: A = 55, B =
-55

√A

^{2}returns 55
√B

^{2}returns 55**Extracting the Integer Part of a Number when the Function Int/Intg is not available**

Two ways to do it:

* Syntax: Fix 0: Rnd:
Norm 1

* Syntax: Switch the
fx-3650p to Base Mode, 3 for Decimal, then enter your program

**The Last Answer (Ans) skips over a prompt**

Syntax:
(calculation): ? → var: f(Ans)

Calculators: fx-3650p, fx-5800p, fx-9860GII

Example: Calculate
5^1.5, ask for A, and add it to 5^1.5

Prog1

5^1.5 : ? → A: Ans +
A

Let A = 2, the result is 13.18033989

Let A = 9.75, the result is 20.93033989

Happy Leap Year Day! Talk to you next time,

Eddie

This blog is property of Edward Shore. 2016