EN
Java - Math.sqrt() method example
0 points
Math sqrt is a static method that returns a number which is the square root of input value. The method works only on positive real numbers.
xxxxxxxxxx1
public class MathExample {2
3
public static void main(String[] args) {4
System.out.println( Math.sqrt( 4 ) ); // 2.05
System.out.println( Math.sqrt( 9 ) ); // 3.06
7
System.out.println( Math.sqrt( 2 ) ); // 1.41421356237309518
System.out.println( Math.sqrt( 0.5 ) ); // 0.70710678118654769
System.out.println( Math.sqrt( 0 ) ); // 0.010
System.out.println( Math.sqrt( -1 ) ); // NaN11
}12
}| Syntax |
xxxxxxxxxx1 package java.lang;2 3 public final class Math {4 5 public static double sqrt(double number) { ... }6 7 }
|
| Parameters | number - double value in the range 0 to +Infinity (primitive value). |
| Result |
Square root If the operation can not be executed |
| Description | sqrt is a static method that returns a number which is square root of input value. The method works only on positive real numbers. |
In this example, the way how to calculate square root using power function is presented.
xxxxxxxxxx1
public class MathExample {2
3
static double calculateSqrt(double value) {4
return Math.pow(value, 0.5);5
}6
7
public static void main(String[] args) {8
// Examples:9
System.out.println( calculateSqrt( 4 ) ); // 210
System.out.println( calculateSqrt( 9 ) ); // 311
12
System.out.println( calculateSqrt( 2 ) ); // 1.414213562373095113
System.out.println( calculateSqrt( 0.5 ) ); // 0.707106781186547614
System.out.println( calculateSqrt( 0 ) ); // 015
System.out.println( calculateSqrt( -1 ) ); // NaN16
}17
}