• Floor[x] gives the greatest integer less than or equal to x.
• Mathematical function (see Section A.3.10
• Floor[x] returns an integer when x is any numeric quantity, whether or not it is an explicit number.
• Example: Floor[Pi^2]
• For exact numeric quantities, Floor
internally uses numerical approximations to establish its result. This process can be affected by the setting of the global variable $MaxExtraPrecision
• New in Version 1; modified in 3.