Android Question Float and Double

D

Deleted member 103

Guest
Hi,

can anyone tell me why this differential output?

B4X: 
Sub Activity_Create(FirstTime As Boolean)
    'Do not forget to load the layout file created with the visual designer. For example:
    'Activity.LoadLayout("Layout1")

    Dim d As Double
    Dim f As Float
   
    d = 1800 / 1000
    f = 1800 / 1000
   
    Log("d=" & d)
    Log("f=" & f)

End Sub

Log-output:
d=1.8
f=1.7999999523162842
 
Sort by date Sort by votes
D

Deleted member 103

Guest
If so, then the type "float" is not useful for me.
I now exchange all float variables with double.
 
Last edited by a moderator:
Upvote 0
D

Deleted member 103

Guest
The function "NumberFormat" does not work with Float.
B4X: 
Sub Activity_Create(FirstTime As Boolean)
    'Do not forget to load the layout file created with the visual designer. For example:
    'Activity.LoadLayout("Layout1")

    Dim d As Double
    Dim f As Float
   
    d = 1800 / 1001
    f = 1800 / 1001
   
    Log("d=" & d)
    Log("f=" & f)
   
    Log(" ")

    d = NumberFormat(d, 1, 4)
    f = NumberFormat(f, 1, 4)

    Log("d=" & d)
    Log("f=" & f)
   
End Sub

Log-output:
d=1.7982017982017982
f=1.7982017993927002

d=1.7982
f=1.798200011253357
 
Upvote 0
D

Deleted member 103

Guest
Unfortunately, I have had too many inaccuracies with the use of float, and so far I do not know where these inaccuracies come from, now it knows.
I will never use Float again in the future.
 
Upvote 0
You must log in or register to reply here.
Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…