Math.sqrt ?

[Adam Polak]

Could someone tell me what the sqrt methode from the Math library is for?

[Marilyn de Queiroz]

static double sqrt(double a)
Returns the correctly rounded positive square root of a double value. API for Math class

[Adam Polak]

Could you please explain more easily?

[Jack Coleman]

Do you know what a square root is?
If not, here is a definition:
A divisor of a quantity that when squared gives the quantity. For example, the square roots of 25 are 5 and -5 because 5 � 5 = 25 and (-5) � (-5) = 25.

[Marilyn de Queiroz]

class Test
{
    public static void main( String[] args )
    {
        double squareRoot = Math.sqrt( 25.0 );
        System.out.println( squareRoot ); // output=5.0
    }
}

You can substitute a different number for 25.0 to see the square root of another number. The square root of 9 is 3. The square root of 100 is 10.

[Robbie shi]

Static double sqrt(double)
output the square root
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Robbies
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