My way of coding Javascript is going on good direction? Please feedback

Project Feedback
#1

I am very thankful to @RandellDawson,. He is my best mentor. Now, I have written a simple calculation program. I do my best to write the code in a good way. I used for loop to reduce the repetition of the code. As well used different functions to manage the codes. As I am a very basic learner, I wish to get suggestions, if this is going on good direction.

Thank you very much.

#2

You are going to need to deal with rounding issues common to all known programming languages. For example, if I enter 0.1 and 0.2 and click the Add button, I expect to only see 0.3. Unfortunately, the value shown is 0.30000000000000004. There are ways of handling this issue. The key is to understand what level of precision is needed for a given calculation.

I am sure you can find several articles on how to deal with the round-off errors in your application.

#3

@RandellDawson Thank you sir. I am going to do it. A good topic for me to study for today. After doing it I will let you know in the comment.

Thank you!

#4

@RandellDawson . I used .toFixed(2) to fix this issue. Is this the correct way? Thank you very much .

#5

Not really. The answer should be just 0.3 without the extra zero. You need to figure out what digits are significant to the final answer. What happens if I want to add 0.001 and 0.0008, your new solution would just show 0.00 instead of 0.0018

#6

Hey!

I like your project, great work!

One thought about your comments:
Most of your comments are like

// Multiply Function
function multiply() {...}

I see no benefits in doing this. The function name is already saying what the function will do, so the comment adds redundant information.

#7

thank you very much @miku86 . I changed it and keep comment for all functions once like
// Calclation Functions

Thank you very much for your feedback and suggestion.

#8

@RandellDawson, Sir, I googled lots and still googling but, could not got the idea to fix this round of errors. I still want to to try more, just want one hint from you, Do we need to write the program for it? or we have any inbuilt function.
Thank you

#9