remove zero from double

Question

Hello, can you help me please:
How can i remove the (0) from a double number.
Double a=2,00;

I want it to be (2) only

Answer 1

@John You should use a for the output. The variable with the casted value.

Answer 2

For outputs:
import java.text.*;

public class Program{
public static void main(String[] args) {
double d = 4.0;
NumberFormat formatter = new
DecimalFormat("#0,0");
System.out.println(formatter.format(d));
}
}
... and vice versa for inputs.

Answer 3

Keep it as a double, if it rounds with a .00 then cast it to an int.

Example/

double exampleInput = 7 + 2;
// this will become 9.0

int temp = (int) exampleInput;

if (temp - exampleInput < 0.0001)
// Use temp
else
// Use double

I wrote < 0.0000...1 just to assure floating precision isn't an issue.

Answer 4

Cast it as an integer. An integer by definition cannot contain a decimal.

Answer 5

Casting will do exactly what you want. For example:

double calcInput = 2.09
int castedValue = (int)calcInput

Answer 6

if it's for a calculator then it might be best to keep it as a double since not every equation well yield a whole number as the answer.

Answer 7

Thank you all , I have tried casting and it works.

Answer 8

I want it for a calculator program, so sometimes the user want to insert a double number like (2,6).