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For College Students

Multiplicity, Default Value and Property String - Explained


In the next video, you will be introduced to the concept of 'multiplicity'.


In the previous video, you learnt about multiplicity, which can be used to represent an array of objects.


The syntax for multiplicity:

ClassName [minValue..maxValue] => InventoryManager [5..20]



Video Transcript


We will now see about multiplicity. When we say multiplicity, it's more like having more than one attribute of the same type with a very common example is arrays. A class can contain an array of objects which are of the same type. Whenever we have to represent an array, we use multiplicity. In this example of an admin class can have multiple inventory managers. When an admin class contains multiple inventory managers, it is represented as an array with a square bracket with the first starting minimum quantity followed by dots, followed by the maximum quantity. In this example, an admin can have minimum have five inventory managers to a maximum of 20 inventory managers. So in this case, it is represented as a square bracket with the min value with few two dots, followed by the max value enclosed within the square bracket.


Video Recap


  • Multiplicity refers to having more than one attribute of the same type, often represented using arrays.

  • Arrays are commonly used to represent multiple objects of the same type within a class.

  • Multiplicity is useful for representing multiple objects of the same type within a class.


In the next video, you will see how to represent the default value of an attribute in a class.



In the previous video, you learnt how to represent default values in a class.


The syntax for the default value:

attributeName : type = defaultValue




In the next video, you will learn the concept of property string.


In the previous video, you learnt about property string.


The syntax for the property string:
attributeName : type = {PropertyString}




In the next video, you will see how to represent multiplicity, default value and property string in


In the previous video, you learnt how to represent multiplicity, default value and property string in 


In this segment, you have been made familiar with the concept and representation of multiplicity, default value and property string in Class Diagram.