Integer close to a real number

DclIntLT
(IRLT)
Get the smaller biggest integer than a designation value.
DclIntGT
(IRGT)
Get bigger more minimum integer than a designation value.
DclIntLE
(IRLE)
Get the biggest integer below a designation value.
DclIntGE
(IRGE)
Get minimum integer over a designation value.

*The corresponding f77 interface name in parentheses.

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