Member Avatar for darek9576

When i write in my program

double pi = Math.PI;

This will give me a value of PI accurate to many decimal places, but what if i want to limit this number
lets say to 3 decimal places..
Is there such a method in Java?

(Im not talking here only about the value of Math.PI or Math.E, but about all double values that contain
many decimal places)

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  • Latest Post Latest Post by BestJewSinceJC
Member Avatar for BestJewSinceJC

Do you really want to truncate the value, or do you actually want to print out a value up to three decimal places?

http://java.sun.com/docs/books/tutorial/java/data/numberformat.html
Look at the DecimalFormat example there. You can also use a C-style printf statement if you want to.
You could also use DecimalFormat to truncate the value, btw - I don't know if it is the most efficient way to do so, but it will work.

DecimalFormat f = new DecimalFormat("#.##");
		System.out.println("Enter a double");
		Scanner in = new Scanner(System.in);
		System.out.println(f.format(in.nextDouble()));
Edited by BestJewSinceJC because: n/a
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