Mathematical Methods

Number Rounding Methods

There are 3 different methods that can be used to round decimal numbers of type double or decimal to integers.

The Ceiling method rounds the decimal number sent to it to the largest integer. So it rounds up.

The floor method rounds the decimal number to the smallest integer. So it rounds down.

The round method rounds a decimal number to the nearest integer. For example, it rounds 3.44 to 3 and 3.55 to 4.

Sample:

decimal number = decimal.Parse(textBox1.Text);

decimal s1 = Math.Ceiling(number);

label1.Text = s1.ToString();

decimal s2= Math.Floor(number);

label6.Text = s2.ToString();

decimal s3= Math.Round(number);

label4.Text = s3.ToString();

The Max method returns the larger of the two numbers given to it. The min method returns the smaller number.

Both methods can be used for all variable types.

Sample:

int a = int.Parse(textBox1.Text);

int b = int.Parse(textBox2.Text);

int c = Math.Max(a, b);

int d = Math.Min(a, b);

label1.Text = "The larger of the numbers is " + c.ToString() + ", the smaller is " + d.ToString() ;

It is used to calculate the power of a number.

Used as Math.Pow (base, power).

Sample:

int a = int.Parse(textBox1.Text);

int b = int.Parse(textBox2.Text);

double result = Math.Pow( a, b);

label1.Text = result.ToString();

We can calculate the square root of a number with the sqrt method. The result will be of type double.

Sample:

int number = int.Parse(textBox1.Text);

double square square = Math.Sqrt ( number );

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