Losing Digits after Decimal Point

Data Type / Conversion Question in C#

[Argblat]

I don't know if it's in the Data Type I'm choosing, or the conversion to a string, but what gives with the following code

Code:
float Pi = 22/7;
lblMsg.Text = Pi.ToString();

Output: 3

-Mike

[Easy_Coder]

Good question! You can try passing a format provider into the .ToString() constructor sorta like this...

using System; 
using System.Globalization; 
class FloatToString 
{ 
 static void Main(string[] args) 
 { 
 NumberFormatInfo nfi = CultureInfo.CurrentCulture.NumberFormat; 
 float Pi = 22/7;  
 Console.WriteLine(Pi.ToString("n", nfi)); // pass number format 
 // returns 3.00 
 } 
}

The other format flags are:
c - currency
d - decimal
e - exponential
f - fixed point
g - general
n - number
r - roundtrip
x - hexidecimal

Take a look at the NumberFormatInfo Class

[emsaw]

Argblat,

The compiler probably needs a bigger hint...

try 22.0 / 7.0
and see if that gets you your floating point.

Mark

[duckhunter]

Try using a Double instead of Float.

This VB code returned: 3.14285714285714

Dim Pi As Double
Pi = 22 / 7
Response.Write(Pi.ToString)

Alternatively, does the C++ float offer optional parameters at declaration? Since 22/7 has decimals, if 3 is being returned then it's the variable that's truncating it.

[Bluesplinter]

Just nudge the compiler a bit when assigning literals to a float, by changing this line in your original code to read:

float Pi = 22f / 7f;

Produces "3.142857" on my machine.

[Argblat]

Thank for all the great responses.

emsaw's solution is probably the easiest given my simplified problem, but all of your suggestions will certainly be useful to anyone who needs to weigh a couple of options, so thank you all again!

-Mike