I have a number like so: 4.47778E+11
Can anyone give me a way of converting that into its number representation easily in c#?
Thanks
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4 Answers
string s = "4.47778e+11";
double d = double.Parse(s);
or
string s = "4.47778e+11";
if (double.TryParse(s,out d))
{
// number was parsed correctly
}
or for internationalization
double.Parse("4.47778e+11", System.Globalization.NumberStyles.Float, System.Globalization.CultureInfo.InvariantCulture);
1 Comment
Bolek Tekielski
Better it would be double.Parse("4.47778e+11", System.Globalization.NumberStyles.Float, System.Globalization.CultureInfo.InvariantCulture); since first example will fail eg. on Polish localization
Try this MSDN thread. It's called scientific notation by the way, and a quick google normally solves simple issues.
That's assuming you mean parsing from a string to a float, your question & title are conflicting
1 Comment
Mark H
Hi mryne, sorry the title was confusing. I have a csv file where people open it in excel and then save as csv, the string representation is a large number, but excel will convert by default into scientific notation. My title should have been clearer!
Use
float num = Convert.ToFloat(Convert.ToDouble(s));But you still lose precision, floats are only precise to 7 digits, so you're better off using just the Convert.ToDouble() (precise to 15 or so digits), so you won't lose any digits in your example.
Comments
Use Convert:
double value = Convert.ToDouble("4.47778E+11");
