CODEWITHSUNDEEP
c#.net
user10553247
user10553247

Reputation:

Return the next whole number

I want to pass a number and have the next whole number returned,

I've tried Math.Ceiling(3) , but it returns 3.

Desired output : 

double val = 9.1 => 10
double val = 3 => 4

Thanks

Upvotes: 2

Views: 139

Answers (3)

Kunal Samant
Kunal Samant

Reputation: 21

Usually when you refer to whole number it is positive integers only. But if you require negative integers as well then you can try this, the code will return 3.0 => 4, -1.0 => 0, -1.1 => -1

double doubleValue = double.Parse(Console.ReadLine());
int wholeNumber = 0;
if ((doubleValue - Math.Floor(doubleValue) > 0))
{
    wholeNumber = int.Parse(Math.Ceiling(doubleValue).ToString());
}
else
{
    wholeNumber = int.Parse((doubleValue + 1).ToString());
}

Upvotes: 0

maccettura
maccettura

Reputation: 10818

There are two ways I would suggest doing this:

Using Math.Floor():

return Math.Floor(input + 1);

Using casting (to lose precision)

return (int)input + 1;

Fiddle here

Upvotes: 5

Divvya Mehta
Divvya Mehta

Reputation: 374

Using just the floor or ceiling wont give you the next whole number in every case. For eg:- If you input negative numbers. Better way is to create a function that does that.

public class Test{ 

    public int NextWholeNumber(double n)
    {
        if(n < 0)
            return 0;
        else
            return Convert.ToInt32(Math.Floor(n)+1);
    }

    // Main method 
    static public void Main() 
    { 
        Test o = new Test();
        Console.WriteLine(o.NextWholeNumber(1.254)); 
    } 
}

Upvotes: 0

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