Java Math class

When we write a program, we may need to calculate the square root of a number, or the absolute value, or obtain a random number, etc.

The Math class in the java.lang package contains many class methods used for scientific calculations. These methods can be called directly through the class name.

In addition, the Math class also has two static constants E and PI , whose values ​​are 2.7182828284590452354 and 3.14159265358979323846 respectively.

Common class methods of the Math class are as follows:

1) public static long abs(double a)

Returns the absolute value of a.

2) public static double max(double a,double b)

Returns the maximum value of a and b.

3) public static double min(double a,double b)

Return the minimum value of a and b.

4) public static double random()

Generate a random number between 0 and 1 (excluding 0 and 1).

5) public static double pow(double a,double b)

Returns a raised to the b power.

6) public static double sqrt(double a)

Returns the square root of a.

7) public static double log(double a)

Returns the logarithm of a.

8) public static double sin(double a)

Returns the sine of a.

9) public static double asin(double a)

Returns the arcsine of a.