Learn to code in Delphi | Part 8 | Calculator Example

[@Ltg-c9r]

Best IT teacher I know

[@thedatasage]

Mr Long, have you considered writing a Delphi book? I would definitely be interested in buying a copy.

[@MrLongITandCAT]

I'm compiling a set of notes that I will combine into one hopefully in the future soonish. If you get my exam guide document you'll have links to all the notes in that pdf.

[@aishapatel731]

You are the besttt IT teacher imma not lie❤

[@MrLongITandCAT]

Thank you for the kind words!

[@kc4me.123]

Hi do you mind doing a example on a calculator with rounding and square rooting please?

[@MrLongITandCAT]

Have you seen our video on Round and Square rooting. Here is the link: kzbin.info/www/bejne/aJS4gIJsoq2jbZY

[@kc4me.123]

@@MrLongITandCAT thank you!

[@michaherberts7691]

very gool video. But i miss the part, how to deal exeptions. eg. division by zero :-) or "aslfkha " as input .

[@MrLongITandCAT]

We will get to that theoretically in the video about the types of errors. If you want to learn about the best why to deal with exceptions and errors then go to our playlists and check out the series on Error Checking.

[@eclipticpk6312]

when i try and add two numbers like 2.5 and 10.5 which would make 13 it gives an error, what can I do

[@MrLongITandCAT]

Are you using real numbers instead of integers. Need to change your input to: rNum1 := StrToFloat( edtNUm1.text ) ; etc and iAns must be an rAns of type real.

[@damion4369]

Hi Mr.Long I am currently running into a problem with my delphi 2010 program itself. When in the coding page and I hit ENTER it doesn't make a new line but skips to the next line. With this issue I can't really complete my code as I cannot make new lines for new instructions. Could you help?

[@MrLongITandCAT]

On your keyboard should be an insert key. Just press this once. If you can't find it then look on the Delphi screen in design view. At the bottom you will se the words Overwrite with and arrow. Click on the arrow and select the insert option.

[@damion4369]

Thank you very much! We can always count on you!

[@ilinarain8567]

Thanks a lot

[@damion4369]

Hi Mr. Long I have been watching your content for about 2 years now. I have got a slight problem with my Calculator app. I followed your code exactly etc. yet when I want to put in decimal numbers it gives me an error. Please help! (I'm on delphi 2010)

[@MrLongITandCAT]

What does the error message say?

[@damion4369]

It says "(3.1eg) is not a valid floating point value"

[@MrLongITandCAT]

@@damion4369 Try using a comma instead of a dot for your decimal numbers. See if that works.

[@damion4369]

Hi Mr.Long thanks a lot it works!

[@lebo7688]

hi sir my program has no errors but still refuses to run

[@spotsied]

Did you make sure that you check your things Like if you already had a runned program on

[@Gamer_4lyf]

Can we get a W in the chat