floor(a)
Calculates the closest integer value that is less than or equal to the value of the parameter.
Type: function
Parameter(s):
- a {Number}:A number. 
Returns:
- 
    {Number}:
 Integer number. 
Calculates the closest integer value that is less than or equal to the value of the parameter.
Type: function
Parameter(s):
A number.
Returns:
Integer number.