CODEWITHSUNDEEP
c#mathrounding
Vishal Suthar
Vishal Suthar

Reputation: 17193

Round to the nearest whole number

I have a number like this: 1.79769313486232E+308 and I want to round it to the nearest whole number. so I tried the below one:

Math.Round(1.79769313486232E+308, 0)

But it still give the same result.

Can any one help me.?

Upvotes: 1

Views: 1151

Answers (4)

Dmitrii Bychenko
Dmitrii Bychenko

Reputation: 186668

The nearest whole number is the same number you've tryed to round up; it has 309 digits:

  1.79769313486232E+308 == 1797693134862320000....00

"E+308" in scientific notation means "multply this by 10 in 308th power". A simple example:

1.234E+3 == 1.234 * Math.Pow(10, 3) == 1.234 * 1000 == 1234

You can easily convince yourself by printing out the number:

  BigInteger b = BigInteger.Parse("1.79769313486232E+308", NumberStyles.Any, CultureInfo.InvariantCulture);
  Console.Write(b.ToString()); // <- 1797693134862320000....00

Upvotes: 1

Rohit
Rohit

Reputation: 10236

Worked for me

Add reference to System.Numerics if you are Using .NET framework 4.0 and then 

 BigInteger b = BigInteger.Parse("1.79769313486232E+308", NumberStyles.Any, CultureInfo.InvariantCulture);

Upvotes: 0

backtrack
backtrack

Reputation: 8144

double.Parse("1.00E+4", CultureInfo.InvariantCulture)

try this

Upvotes: 0

Joni
Joni

Reputation: 111239

Since you have fewer than 309 digits after the dot your number is a whole number. The scientific notation must be confusing you, for example 1.234e+003 is also an integer because it's equal to 1234.

Upvotes: 3

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