CODEWITHSUNDEEP
javamath
Dan
Dan

Reputation: 4663

Beginner in Java - Why doesn't this Java code work: what do I need for Math.sqrt to be recognized?

Here is the code:

class Root {
    public static void main(String[] arguments) {
        int number = 225;
        System.out.println("The square root of " 
                + number 
                + " is " 
                + Math.sqrt.(number)
                );
    }
}

I am learning Java from Sam's Teach Yourself Java in 24 hours 6th edition and already in chapter four I found something I can't get to work. The Math.sqrt function is not recognized, so I presume I need to import something to make it work, but the book doesn't mention anything at all and copying the code verbatim from the author's website also doesn't mention it. Also, nothing was mentioned in setting up Netbeans that included changing any options. I am using Netbeans 7.1 which I suspect is the problem. Any workaround? Help?

Upvotes: 3

Views: 753

Answers (3)

amit
amit

Reputation: 178431

Math.sqrt.(number)
         ↑

should be 

Math.sqrt(number)

You got an extra dot there.

Upvotes: 13

msm
msm

Reputation: 33

Yes you had used an extra dot Math.sqrt(number) sqrt is an static function in math class ...and remember that java.lan.object package is auto import.strong text

Upvotes: 0

esaj
esaj

Reputation: 16035

You have an extra dot (.) after "sqrt", change "Math.sqrt.(number)" to "Math.sqrt(number)". Math-class is under the java.lang -package, and nothing under that package needs to be separately imported.

Upvotes: 2

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