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Class vs Object in OOP: Key Differences Every Developer Should Know

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In object-oriented programming (OOP), a Class acts as a blueprint that defines the rules and structure for creating objects, without occupying any memory itself. An Object is a real instance created from that class, holding actual values and consuming memory at runtime. Every class is built from two core components: attributes, which store data, and methods, which define behavior. A single class can be written once and used to create multiple objects, each with its own set of values. Notably, an object is not required to assign values to every attribute or use every method defined in its class.

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