How do I get the value after decimal?

Question

Example -> 4.11 I need to get 11 which is the value after decimal

How do i get that in C#?

What data-type is the input? And what is the general rule? For instance, what if the input is 4.011? — Oliver Charlesworth, Mar 18 '12 at 12:57
Why do you want that? There may be a better approach if the requirement is understood. — Steve Wellens, Mar 18 '12 at 13:18

Thomas Kreidl · Answer 1 · 2017-10-17T19:47:02.803

0

It's old but why dont put the value in an int so it shorts to a number without decimal.

And than subtract the value with the int number like this -->

double myValue = 4.11;
int myInteger = myValue // It's 4
double valueAfterDecimal = myValue - myInteger; // It's 4.11 - 4 = 0.11
int valueAsInt = Convert.ToInt16(valueAfterDecimal * 100) ;
// 0.11 *100 = 11.0 --> Convert to Int = 11

edited Oct 17 '17 at 19:47

answered Oct 13 '17 at 11:47

Thomas Kreidl

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But the result should be 11. – Gustav Oct 13 '17 at 15:41
I didn't noticed that. But you can simply take 0.11 * 100 and write it in an int-value to cut all other values after decimal. – Thomas Kreidl Oct 17 '17 at 15:06
Yes, but you miss the subtle detail, that the result should be 11, not 0.11. – Gustav Oct 17 '17 at 15:47

Gustav · Answer 2 · 2017-10-13T15:21:36.327

0

Use this simple method which does preserve leading zeroes of the mantissa:

double number = -1234.056789;
string mantissa = string.Empty;
decimal fraction = (decimal)number % 1;
if (fraction != 0)
{
    mantissa = Math.Abs(fraction).ToString().Substring(2);
}
Console.WriteLine(mantissa);
Console.ReadKey();

Result: 056789

edited Oct 13 '17 at 15:21

answered Oct 13 '17 at 15:05

Gustav

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score 0 · Answer 3 · answered Mar 18 '12 at 12:56

0

Subtract the value from the math.int of the value

answered Mar 18 '12 at 12:56

Sparky

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Shadow The GPT Wizard · Answer 4 · 2012-03-18T14:21:14.253

0

If you mean get the digits after the decimal point (if exists) as a raw string, just use string manipulation:

double myNumber = 4.0001115;
string myString = myNumber.ToString();
string decimalSeparator = CultureInfo.CurrentCulture.NumberFormat.NumberDecimalSeparator;
int index = myString.IndexOf(decimalSeparator);
string afterDecimal = (index >= 0 && !myString.EndsWith(decimalSeparator)) ? myString.Substring(index + decimalSeparator.Length) : "";

Otherwise if you mean get it as number by its own right, the other answers here are correct.

edited Mar 18 '12 at 14:21

answered Mar 18 '12 at 13:04

Shadow The GPT Wizard

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This would not work for me because my [`CurrentCulture`'s `NumberDecimalSeparator`](http://stackoverflow.com/a/9758585/284240) is `','` and `myNumber.ToString()` would be `4,0001115`. – Tim Schmelter Mar 18 '12 at 13:47
@Tim good point, edited my post to support different formats. :) – Shadow The GPT Wizard Mar 18 '12 at 14:21

How do I get the value after decimal?

4 Answers4