Android Question How to print the trailing ".00" of float/double values?

toby · Jul 18, 2021

When sometime a float value just contains just whole number, for example, 123.00, what's the correct way of printing it out as "123.00" instead of "123"?

B4X:

Dim value As Float=123.00 
    LogColor($"$1.2{value}"$, Colors.Blue)  'printed: 123, 'No trailing ".00" is logged.     expected: 123.00   
    
    value=123.456  'this value works
    LogColor($"$1.2{value}"$, Colors.Blue) 'printed 123.46  expected 123.46

TIA

toby · Jul 18, 2021

If value=123.1, I also would like to print it as "123.10".

EnriqueGonzalez · Jul 18, 2021

Check numberformat

Search Results

www.b4x.com

Mahares · Jul 18, 2021

toby said:
123.00, what's the correct way of printing it out as "123.00"

Use the B4XFormatter library. see below:

B4X:

Private formatter As B4XFormatter  'need B4XFormatter lib

Dim value As Float=123.00
    formatter.Initialize
    Dim DefaultFormat As B4XFormatData = formatter.GetDefaultFormat
    DefaultFormat.MaximumFractions = 2
    DefaultFormat.MinimumFractions = 2
    Log(formatter.Format(value))  'displays 123.00
    
    Log(formatter.Format(123.1))  'displays 123.10

emexes · Jul 18, 2021

Enrique Gonzalez R said:
Check numberformat

or NumberFormat2

Mahares · Jul 18, 2021

This works:

B4X:

Log(NumberFormat2(value,1, 2,2,False))

But not this:

B4X:

Log(NumberFormat(value,1, 2))

toby · Jul 18, 2021

Both @Mahares's solutions work for me while NumberFormat() doesn't.

emexes · Jul 18, 2021

toby said:
Both @Mahares's solutions work for me while NumberFormat() doesn't.

I think NumberFormat doesn't print trailing 0's eg works for 1.23 and 4.56 but not for 78.90 (which would format as 78.9)

"at most" is not the same as "guaranteed" ?

emexes · Jul 18, 2021

toby said:
When sometime a float value just contains just whole number, for example, 123.00

I just realised that if the float value is known to be a whole number, then you could just print it out and then print the ".00" immediately after.

Something of a Gordian Knot solution, but hey, what could possibly go wrong?!?! ?

Android Question How to print the trailing ".00" of float/double values?

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