Question

i get the value from textbox.Text
i have the variable float _value; that store the value from textbox

_value = float.Parse(textBox.text);

when i want to show up the _value, it will be in epsilon number.
eg.

textbox.Text = 100000000;

_value will store with 1.0E+12

i do want to _value store the real number 10000000.

thanks.

Answer 1

The value is stored in a binary floating point format, probably IEEE754. The difference you observed is one of textual representation, when the value is converted to a string. You can control the way the values are displayed with format specifiers, to achieve your desired output,

float f = 1000000000000;
Console.WriteLine (string.Format("{0:.#}\n", f));

formats the number as “1000000000000”.

More on string.Format.