round, floor, ceiling. Rounding of number

^math:round(number)
- rounding to the closest integer
^math:floor(number)
-rounding towards lesser integer
^math:ceiling(number)
-rounding towards greater integer


The methods return round value of the given number of class
double.

Example
^math:round(45.50)
-Will equal 46
^math:floor(45.60)
-Will equal 45
^math:ceiling(45.20)
-Will equal 46
^math:round(-4.5)
-Will equal -4
^math:floor(-4.6)
-Will equal -5
^math:ceiling(-4.20)
-Will equal -4



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