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finding difference between two numbers with commas/decimals



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finding difference between two numbers with commas/decimals

Postby yodish » Fri Aug 07, 2015 12:03 am

Hello,
If
amount1 = 3,430,035.43 and
amount2 = 9,430,665.43
and I want to find the difference between these two numbers, why does the following code give me a 'Bad arithmetic conversion' error?
Select all
If Compare(amount1,amount2) /= 0 Then do
   Difference = amount2 - amount1
   say Difference
end


Thanks in advance!
yodish
 
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Re: finding difference between two numbers with commas/decim

Postby enrico-sorichetti » Fri Aug 07, 2015 1:56 am

because Rexx does not understand the comma separating the thousandths
rexx only understands the decimal point.

also no reason to use the compare function

Select all
a = "3,430,035.43"
b = "9,430,665.43"

a = space(translate(a," ",","),0)
b = space(translate(b," ",","),0)

If a \= b Then do
   d = b - a
   say d
end
cheers
enrico
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Re: finding difference between two numbers with commas/decim

Postby yodish » Fri Aug 07, 2015 6:21 pm

Thank you Enrico,

Now that d = 6000630.00
You wouldn't happen to know an easy way to put comma(s) back, would you?
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Re: finding difference between two numbers with commas/decim

Postby enrico-sorichetti » Fri Aug 07, 2015 7:19 pm

quick and dirty,
ONLY FOR >0 NUMBERS

Select all
a = "3,430,035.43"
b = "9,430,665.43"

a = space(translate(a," ",","),0)
b = space(translate(b," ",","),0)

d = b - a

say left(d,         12) zformat(d)

say left(1,         12) zformat(1)
say left(999,       12) zformat(999)
say left(1000,      12) zformat(1000)
say left(10000,     12) zformat(10000)
say left(100000,    12) zformat(100000)
say left(1000000,   12) zformat(1000000)

exit

zformat:procedure
    parse arg N
    parse var N  I "." D .

    if  D = "" then ,
        F = ""
    else ,
        F = "." || D

    do  while ( I >= 1000 )

        F   = "," || right( I // 1000, 3, "0" ) || F
        I   = I % 1000
    end

    if  I = 0 then ,
        return substr(F, 2)
    else ,
        return I || F


Select all
6000630.00   6,000,630.00
1            1
999          999
1000         1,000
10000        10,000
100000       100,000
1000000      1,000,000
cheers
enrico
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Re: finding difference between two numbers with commas/decim

Postby yodish » Fri Aug 07, 2015 11:02 pm

Enrico,
I appreciate your help.

I'm running into a stumbling block though. I need to be able to perform basic calculations on numbers. However, the solution we have been talking about assumes the numbers contain 2 commas.

Do you have any idea how I could modify the original code to account for no commas, 1 comma, 2 commas, or even 3 commas?

thanks!
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Re: finding difference between two numbers with commas/decim

Postby yodish » Fri Aug 07, 2015 11:21 pm

I can't take credit for this, I found it in another thread; but, this seems to strip all commas, regardless of how many.
Select all
a = Space(Translate(a,,','),0)
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Re: finding difference between two numbers with commas/decim

Postby enrico-sorichetti » Sat Aug 08, 2015 1:53 am

Do you have any idea how I could modify the original code to account for no commas, 1 comma, 2 commas, or even 3 commas?


what the fluck do You think
Select all
a = space(translate(a," ",","),0)

does, if not getting rid of all the commas in the string ???

Select all
a = "3,430,035,430,035,430,035,430,035,430,035,430,035.43"
a1 = space(translate(a," ",","),0)
say "***** a1 " a1


I am well aware that
Select all
a = space(translate(a,,","),0)

does the same
but I prefer clarity to semi obfuscation ( for the people who have to maintain Your code )

looks like I wasted my time writing and testing my snippets
good luck I am calling myself out :evil:
cheers
enrico
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Re: finding difference between two numbers with commas/decim

Postby yodish » Sat Aug 08, 2015 4:38 am

I appreciate the help, i'm still wrapping my head around the code and hope to understand it better in the future. Have a nice weekend.
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Re: finding difference between two numbers with commas/decim

Postby BillyBoyo » Sat Aug 08, 2015 2:43 pm

When looking at code you don't understand, you can use Trace in the code and experiment with different data. You need to understand code before you can use it. You need to attempt to understand it before asking further questions about it.
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Re: finding difference between two numbers with commas/decim

Postby delorimier » Sun Aug 09, 2015 5:25 am

enrico-sorichetti wrote:looks like I wasted my time writing and testing my snippets


No you did not Enrico :-) I just used your zformat procedure for my personal use. I also learned from your small code.

Thanks.

Rene FERLAND, Montreal
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