Android Math Usage Encyclopedia



Java has a very useful tool class, you can less than a lot of if else to judge, but not many people use, published this article is intended to let many people use this tool class, improve code quality and force lattice

Math.PI returns the recorded pi

MATH.E returns the constant of record E

Math.Abs return Absolute Value

Math.sin return sine function math.asin inverse chord function

Math.Cos return cosine function math.acos inverse cosine function

Math.tan return tangent function Math.atan inverse tangent function   The inverse tangent function of the math.atan2 quotient

Math.todegrees return radian to angle Math.toradians angle to radians

Math.ceil returns the largest integer that is not less than a certain number

For example

Math.ceil (10.2) = 11;

Math.ceil (-10.2) =-10;

Math.floor returns the largest integer not greater than a number

For example

Math.floor (10.2) = 10;

Math.floor (-10.2) =-11;

Math.exp returns any of the second sides of E

MATH.LOG10 returns the logarithm with a 10 base

Math.log returns the natural logarithm

Math.rint returns the nearest integer from a number

For example:

Math.rint (10.5) = 10.0;

Math.rint (10.4) = 10.0;

Math.rint (10.6) = 11.0;

Math.Round rounding returns an int or a long type (the previous function returns a double type)

Math.random returns a random number between 0 and 1.

Math.ieeeremainder (x,y) return x%y value

Math.max returns the largest of the two numbers

Math.min returns the smallest of two digits

Math.sqrt return to Root

Math.pow returns a number of any secondary party

MATH.SQRT (x): Returns the square root
Math.pow (X,y): Returns the Y-second side of X

Math.nextdown (x) 0.00001 smaller than x

Math.nextup (x) 0.00001 larger than X

Math.addexact (1, 2); Addition operations

Math.subtractexact (3, 5); subtraction operation
Math.multiplyexact (2, 4); Multiplication operations

Math.scalb (6, 3); Represents 6 * (2 of 3)