float

OPL keyword for floats.

Purpose

OPL keyword for the basic data type float. Also a reserved word in IBM ILOG Script.

context
Model files (.mod)

Syntax

LiteralType: "int"
           | "float"
           | "boolean"
           | "int+"
           | "float+"
           | "string"
           | "range"
           | "range" "float"
           | "constraint"

Description

OPL provides a subset of real numbers as the basic data type float. The implementation of floats in OPL obeys the IEEE 754 standard for floating-point arithmetic and the data type float in OPL uses double-precision floating-point numbers. OPL also has a predefined float constant, infinity, to represent the IEEE infinity symbol. Declarations of floats are essentially similar to declarations of integers.

Example

The declaration:


float f = 3.2;

declares a float f whose value is 3.2. The value of the float can be specified by an arbitrary expression.

The keyword float can also be used as the type of decision variables, as in


dvar float Cut[Patterns] in 0..1000000;