JS Take integer rounding

1. Discard the fractional part, preserving the whole number of parts
parseint (5/2)

2. Rounding up, with decimals on the integer part plus 1

Math.ceil (5/2)

3, rounded.

Math.Round (5/2)

4, rounding down

Math.floor (5/2)

Methods of the Math object

Ff:firefox, N:netscape, Ie:internet Explorer

Method	Description	FF	N	IE
ABS (x)	The absolute value of the return number	1	2	3
ACOs (x)	Inverse cosine value of the return number	1	2	3
ASIN (x)	The inverse chord value of the returned number	1	2	3
Atan (x)	Returns the inverse tangent of x with a value between-PI/2 and PI/2 radians	1	2	3
ATAN2 (y,x)	Returns the angle from x-axis to point (x, y) (between-PI/2 and PI/2 radians)	1	2	3
Ceil (x)	Rounds a number.	1	2	3
COS (x)	Cosine of the returned number	1	2	3
EXP (x)	Returns the exponent of E.	1	2	3
Floor (x)	Rounds down a number.	1	2	3
Log (x)	Natural logarithm of the number of returns (Bottom is E)	1	2	3
Max (x, y)	Returns the highest value in X and Y	1	2	3
Min (x, y)	Returns the lowest value in X and Y	1	2	3
Pow (x, y)	Returns the Y power of X	1	2	3
Random ()	Returns a random number between 0 ~ 1	1	2	3
Round (x)	Rounding a number to the nearest integer	1	2	3
Sin (x)	The sine of the returned number	1	2	3
sqrt (x)	The square root of the returned number	1	2	3
Tan (x)	Returns the tangent of a corner	1	2	3
Tosource ()	The source code that represents the object	1	4	-
ValueOf ()	Returns the original value of a Math object

JS Take integer rounding