====== Description ======
The floor node returns the floor of the value of its child-node.  In other words, it rounds down the child-node's value to the largest integer not more than it.

====== Constraints ======
  * Minimum number of child-nodes: 1
  * Maximum number of child-nodes: 1

====== Calculus ======
The floor node's value is calculated by finding the largest integer not more than the value of its child-node.

^  input  ^  output  ^
|  34.2323  |  34  |
|  34.0000  |  34  |
|  -34.2323  |  -35  |