Formatting double to String

Question

I make such formatting:

 str += String.Format("{0,-25}", doubl);

I need my numbers to be divided by spaces, that's why I use {0,-25}.

But sometimes I get numbers like 2.15083096934631E-05

How to get traditional numbers like 0,000021508 , without "E-05" ?

The value of doubl is like 0.000021436573129839587

2.15083096934631E-05 is not 2.1508309. it's ~ 0,000021508309 — x2., Jul 17 '12 at 07:31
http://stackoverflow.com/questions/1546113/double-to-string-conversion-without-scientific-notation — x2., Jul 17 '12 at 07:34

Mahmoud Gamal · Answer 1 · 2012-07-17T07:38:56.943

2

Use the The "0" Custom Specifier:

str = doubl1.ToString("0.0000000");

edited Jul 17 '12 at 07:38

answered Jul 17 '12 at 07:33

Mahmoud Gamal

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score 2 · Answer 2 · answered Jul 17 '12 at 07:33

2

Try double.ToString("format") (F - Fixed-point)

str=doubleValue.ToString("F10");

answered Jul 17 '12 at 07:33

KV Prajapati

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[F - Fixed point and 10 - number of decimal digits](http://msdn.microsoft.com/en-us/library/dwhawy9k.aspx) – KV Prajapati Jul 17 '12 at 07:43

score 0 · Answer 3 · answered Jul 17 '12 at 07:45

You can format the output by passing in F or N to the ToString(), to represent more decimal points i think you will have to specify something like N15 (find the suitable limit you need depending on your values) but the issue here is trailing 0 after your actual number

[double value].ToString("N15") // this should output without the exponent sign

To avoid trailing zeros you just need to Trim

[double value].ToString("N15").TrimEnd('0');

score 0 · Answer 4 · answered Jun 06 '14 at 04:26

All the Answers prior to mine were fine but for me, I had a very ugly problem. My 'Answer' would be filled by Zero's and it made the answer very bulky if there was only 5 Zeros needed. I came up with this:

double Q = ((1000 * 1000) * (2 * 2));
double Answer = ((Q * 199) / 2);
this.AnswerTBox1.Text = String.Format("{0:F" + Answer.ToString().Length + "}", Answer);

This tidy's up the 'Uglyness' of unnecessary Zeros.

All the Best

Chris

Formatting double to String

4 Answers4