Need help to make a program that can do Mod for TI-83 plus

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July 22nd, 2006, 05:44 PM

chobo2

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Need help to make a program that can do Mod for TI-83 plus

Hi

Can someone write me the code on how to make a program to calculate mod?

you know like 9 % 3 = 0

I just can't believe that they did not put that on the calc.

I don't have a cable so I need the code written out so I can program it in my hand(I imagine it won't be that long)

thanks.

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July 22nd, 2006, 06:39 PM

drumz0rz

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sorry, but I have no idea what mod is, and how 9 percent 3 is zero.

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mphill agrees: Are you serious?

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July 22nd, 2006, 06:48 PM

chobo2

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Here is some post I just grabbed off some math forum that might do a better job explaining what mod is.

Quote:

Hi there, insert name Here. I think you're right that '%' is being used as the
modulus operator. It is probably most often seen in the form:

4 mod 3

but computer programmers use the % shorthand in several
languages, and it is also fairly fast way of typing it.

The modulus operator returns the remainder when the first
number is divided by the second. Here are some examples:

1 mod 3 = 1 (or 1 % 3 = 1)
2 mod 3 = 2
3 mod 3 = 0
4 mod 3 = 1
5 mod 3 = 2
6 mod 3 = 0
etc...

This seemingly simple operator is actually a very powerful tool
for mathematicians, especially those who specialize in Number
Theory.

Here is some more reading about it.
http://mathforum.org/library/drmath...ect/dm_mod.html

Hope that clears things up

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July 22nd, 2006, 09:27 PM

omrsafetyo

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modulus is the remainder of a division problem.

For instance, 7/2 = 3.5 OR 7/2 = 3 with a remainder of 1.
Thus 7%3=1
modulus produces the remainder.

Try this out
for any values x and y

fpart(x/y)*y

thats a good TI-83 algorithm for modulus.

fpart displays the decimal - so by multiplying that by the denominator, you get the interger remainder.

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Nilpo agrees: Very nice...

Last edited by omrsafetyo : July 22nd, 2006 at 09:36 PM.

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July 23rd, 2006, 03:56 PM

chobo2

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Quote:

Originally Posted by omrsafetyo

How would I exactly write that on my calc. I never written a program before so I am not srue if I need to include otherstuff with the stuff you wrote above.

this is what I have:
PROGRAM: MOD
: "MODULAS"
: ClrHome
: Prompt A,B
: DISP fpart(A/B)*B // seems to crash here
: Pause
: ClrHome

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July 23rd, 2006, 06:25 PM

chobo2

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Quote:

Originally Posted by chobo2

I think I figured it out my problem was I was writting fpart out when I guess I should have gone to math-num-fpart and insert it in.

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July 25th, 2006, 03:06 AM

omrsafetyo

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so its working now?

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March 4th, 2008, 09:32 PM

jota_alfombria

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Try this

Code:

PROGRAM: MOD
: "MODULUS"
: ClrHome
: Prompt A,B
: fpart(A/B)*B -> X    // fpart() = [2ND]>[CATALOG]>"fpart("
: DISP X
: Pause
: ClrHome

Alternatively, you could try this

Code:

PROGRAM: MOD
: "MODULUS"
: ClrHome
: Prompt A,B
: A-B*int(A/B) -> X    // int() = [MATH]>[NUM]>"int("
: DISP X
: Pause
: ClrHome

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March 5th, 2008, 10:36 AM

mphill

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Nice, but I guess his homework deadline passed long time ago.

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March 5th, 2008, 11:02 AM

archnaid

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Quote:

Originally Posted by mphill

Nice, but I guess his homework deadline passed long time ago.

Programming for the calculator, I doubt it was homework.

Trader Rating: 0 · #11

March 5th, 2008, 11:10 AM

mphill

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Who knows, You Americans are wierd.

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Sand Man agrees: LOL but totally true though.

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