How can I remove only the last trailing zero?

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How can i remove the one trailing zero for a decimal datatype, for example refer below sample data.

Input Values  >> Expected output values 
1)29.36       >> 29.36
2)29.00       >> 29.0
3)20.00       >> 20.0
4)29.50       >> 29.5
5)20          >> 20

What I have tried:

I tried to use float data type but if the input value is 29.00 it is showing as 29 only but i want it to be 29.0.
string formats also seems to be in accurate in this case as i need to remove second decimal value only if it zero.

Posted 16-Mar-18 20:53pm

Ved_deV

Updated 17-Mar-18 8:16am

v3

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OriginalGriff · Answer 1 · 2018-03-16T21:32:00

Solution 1

Try a format string: "0.0#"

C#

decimal d;
d = 29.36M;
Console.WriteLine("{0}:{0:0.0#}", d);
d = 29.00M;
Console.WriteLine("{0}:{0:0.0#}", d);
d = 20.00M;
Console.WriteLine("{0}:{0:0.0#}", d);
d = 29.50M;
Console.WriteLine("{0}:{0:0.0#}", d);

Gives:

29.36:29.36
29.00:29.0
20.00:20.0
29.50:29.5

Posted 16-Mar-18 21:32pm

OriginalGriff

Comments

Maciej Los 17-Mar-18 9:36am

5ed!

Ved_deV 17-Mar-18 14:18pm

That is very good solution, thanks for your answer.
BUT, i missed one more point to mention in question which i updated now where i am expecting out put of 20 if the input s 20, and 29 if the input is 29,
Could you please help me in achieving this result too

Maciej Los · Answer 2 · 2018-03-17T03:37:00

In addition to solution #1 by OriginalGriff, i'd recommend to read this: Floating Point Demystified, Part 1[^] and this: What Every Computer Scientist Should Know About Floating-Point Arithmetic[^]

Conclusion: you want to display decimal value in custom format.

Standard Numeric Format Strings | Microsoft Docs[^]
Custom Numeric Format Strings | Microsoft Docs[^]