Forum Discussion
Convert Number to Words LAMBDA (Very Large Numbers)
That's interesting to compare with PeterBartholomew1 formula suggested couple of years ago https://techcommunity.microsoft.com/t5/excel-blog/announcing-let/ba-p/1233572
=LET(
Denom, {" Trillion ";" Billion ";" Million ";" Thousand ";" Dollars ";" Cents"},
Nums, {"","One","Two","Three","Four","Five","Six","Seven","Eight"," Nine"},
Teens, {"Ten","Eleven","Twelve","Thirteen","Fourteen","Fifteen","Sixteen","Seventeen","Eighteen","Nineteen"},
Tens, {"","Ten","Twenty"," Thirty"," Forty","Fifty","Sixty"," Seventy","Eighty","Ninety"},
grp, {0;1;2;3;4;5},
LET(
N, SUBSTITUTE( TEXT( A1, REPT(0,15)&".00" ),".","0"),
H, VALUE( MID( N, 3*grp+1, 1) ),
T, VALUE( MID( N, 3*grp+2, 1) ),
U, VALUE( MID( N, 3*grp+3, 1) ),
Htxt, IF( H, INDEX( Nums, H+1 ) & " Hundred ", "" ),
Ttxt, IF( T>1, INDEX( Tens, T+1 ) & IF( U>0, "-", "" ), " " ),
Utxt, IF( (T+U), IF( T=1, INDEX( Teens, U+1 ), INDEX(Nums, U+1 ) ) ),
CONCAT( IF( H+T+U, Htxt & Ttxt & Utxt & Denom, "" ) )
)
)Lot of changes in Excel from that time.
Will play with both some later.
SergeiBaklan My goal was actually two fold for both Indian as well as International Number System. Both are very different in terms of place value of numbers. I first made for Indian and then adapted as per International System (With few addons, Some steps and Lookup Tables were common).
Please accept my apologies for conducting an exchange with SergeiBaklan on your thread.
I must admit, I wondered how you dealt with the more irregular patterns of Lakh and Crore (I find the number formatting to be enough of a challenge). Presumably you could get some benefit from having multiple groups of 2 digits rather than my 5 groups of 3 digits?
I have now downloaded your Lambda function. Congratulations, there is nothing short in terms of ambition in that function! I did try
= MAP(target, format, Indian.Number_To_Words)where 'format' is a range containing {1;0;1} but it only returned the first number.
[Added. Only the first number had no decimal digits, so MAP works OK with your function]
The "Indian" prefix came about because I specified a Name space; I have never done that before.
The only thing I wondered about was whether it is necessary to be able to switch between international and local practice for reporting numbers? Wouldn't two functions have done the job as well and permitted some further optimisation of the individual code?
- Thanks a lot for the praise. Actually I originally made the function as per Indian Number System but then thought of adding more flexibility of choosing between the two systems as many steps were common in them.
Thank you for the reference. Due to a clumsy transfer of data to a new computer, I had lost the original English version and was going to reconstruct it from a German language version I had written or the French version Frederic LE GUEN had developed from the original. The original workbook predates the CONCAT function and relied upon a multitude of defined names to conduct array calculations pre-dynamic-array.
Something that occurred when I tried to set up a new workbook from the published formula was that the formula refused to commit. I tracked that back to the removal of '.' (period) as a valid character within a LET local name.
TextDollarAmountλ = LAMBDA(target, LET( Denom, {" Million, ";" Thousand ";" Dollars ";" Cents"}, Nums, {"","One","Two","Three","Four","Five","Six","Seven","Eight"," Nine"}, Teens, {"Ten","Eleven","Twelve","Thirteen","Fourteen","Fifteen","Sixteen","Seventeen","Eighteen","Nineteen"}, Tens, {"","Ten","Twenty"," Thirty"," Forty","Fifty","Sixty"," Seventy","Eighty","Ninety"}, grp, {0;1;2;3}, N, SUBSTITUTE( TEXT( target, REPT(0,9)&".00" ),".","0"), H, VALUE( MID( N, 3*grp+1, 1) ), T, VALUE( MID( N, 3*grp+2, 1) ), U, VALUE( MID( N, 3*grp+3, 1) ), Htxt, IF( H, INDEX( Nums, H+1 ) & " Hundred ", "" ), Ttxt, IF( T>1, INDEX( Tens, T+1 ) & IF( U>0, "-", "" ), " " ), Utxt, IF( (T+U), IF( T=1, INDEX( Teens, U+1 ), INDEX(Nums, U+1 ) ) ), CONCAT(IF(H+T+U, Htxt & Ttxt & Utxt & Denom, "") ) ) );The good thing about turning the formula into a Lambda function is that it can be applied to many values within a workbook.
= MAP(target, TextDollarAmountλ)PeterBartholomew1 , actually I took your initial formula in the comments to the blog here with LET() announcement . Removed dot in names, added "Billion" to Denom and expanded grp (from 0 to 5).
Yes, these days it's more reasonable to use it as custom function. By the way, UDF is reserved for VBA functions, will we use the same abbreviation for lambdas or one day another term appears?
- May be we can call them Custom LAMBDA Function ??
