Formula value by pressing the key 3 or 4 times

[yunuseren]

Hello there
Can I print a formula value by pressing the key 4 times with the keypad?
can you share sample code. e.g. volume formula

[UKHeliBob]

@yunuseren

Can I print a formula value by pressing the key 4 times with the keypad?

Yes

@yunuseren

can you share sample code

When is our assignment due to be handed in ?

[ToddL1962]

@yunuseren

Can I print a formula value

What "formula value"?

@yunuseren

by pressing the key 4 times with the keypad?

Which key is "the" key?

@yunuseren

can you share sample code. e.g. volume formula

Sure:

void setup()
{
}

void loop()
{
}

I compiled and tested it

[yunuseren]

the equation looks like this Q=mc(Tf-Ti)
I want to write m, c and T values ​​with keypad

[UKHeliBob]

Please clarify what you want to do

Do you want to press a single key to enter each value, ie just 3 keypresses, one for each value, as the title of the topic implies ?

More likely you want to use the keypad to enter a number, press an "enter" key, enter a second number then a third number

Here is some advice on entering a multi digit number using a keypad

Keypad data entry. A beginners guide

A common problem raised in the forum is how to use a keypad to enter a number to be used in a sketch. The examples with the Keypad library show the principles but there is little or no explanation of how they work or how they can be changed The aim of this thread is to explain the principles of keypad entry, explain how and why some things work or don't work and to provide a way forward for more complicated use of the Keypad library Let's start with "How do I enter a number using the keypad ?" …

[b707]

@yunuseren

I want to write m, c and T values ​​with keypad

Ok, I think I understood.
Let's me translate your sentence:

How to enter a multi-digit number by pressing keyboard buttons 3 4 times?

Did I guess it?

[yunuseren]

@b707

How to enter a multi-digit number by pressing keyboard buttons 3 4 times?

When the arduino is running, the formula Q=m.c.(Tf-Ti) will be displayed.
Then m=? I will write the value of m.
Then c=? I will write the value of c.
Then Tf=? I will write the tf value.
Then Ti=? I will write the value of Ti.
Finally, the Q value will appear on the screen.

[UKHeliBob]

Read the advice in the link that I posted. It shows how to enter a multi digit number

[StefanL38]

How about using a ready to use pocket-calculator for that?
Or your smartphone with a calculator app?

You received not the solution you asked for because your first question is too global:

"Can somebody post the complete code that does (unclear description of what the code shall do)"

You clarified what the code shall do. Well done.
Still you have shown way too less own effort. And you haven't asked a specific question about some basic code that you used as a start.

This is the reason why you only received a link to "how entering multi-digits with a keypad works

It is up to you to demontrate some real own effort through
post information about

• what microcontroller you are using
• what display you are using
• what keypad you are using

posting a first piece of code as a code-section
and asking a specific question.

google is your friend
https://www.google.de/search?q=arduino+keypad+input+multiple+digits
best regards Stefan