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c#winformsfloating-point
Qusyaire Ezwan
Qusyaire Ezwan

Reputation: 279

Prevent float.Parse(string) result to epsilon number

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.

Upvotes: 0

Views: 449

Answers (1)

Daniel Fischer
Daniel Fischer

Reputation: 183868

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.

Upvotes: 2

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