Sealed Class

contents
𝙰𝚋𝚘𝚞𝚝 𝚜𝚎𝚊𝚕𝚎𝚍 𝚌𝚕𝚊𝚜𝚜 𝚒𝚗 𝚊𝚗𝚍𝚛𝚘𝚒𝚍
𝚂𝚞𝚐𝚐𝚎𝚜𝚝𝚒𝚗𝚐 𝚊𝚕𝚕 𝚙𝚘𝚜𝚜𝚒𝚋𝚕𝚎 𝚘𝚙𝚝𝚒𝚘𝚗𝚜 𝚘𝚏 𝚜𝚝𝚊𝚝𝚎 𝚞𝚜𝚒𝚗𝚐 𝚜𝚎𝚊𝚕𝚎𝚍 𝚌𝚕𝚊𝚜𝚜
𝙰𝚌𝚌𝚎𝚜𝚜𝚒𝚗𝚐 𝚊 𝚟𝚊𝚛𝚒𝚊𝚋𝚕𝚎 𝚘𝚏 𝚊 𝚜𝚎𝚊𝚕𝚎𝚍 𝚌𝚕𝚊𝚜𝚜
𝙰𝚌𝚌𝚎𝚜𝚜𝚒𝚗𝚐 𝚊 𝚏𝚞𝚗𝚌𝚝𝚒𝚘𝚗 𝚒𝚗 𝚜𝚎𝚊𝚕𝚎𝚍 𝚌𝚕𝚊𝚜𝚜
𝚁𝚘𝚕𝚎 𝚘𝚏 𝚊𝚋𝚜𝚝𝚛𝚊𝚌𝚝 𝚟𝚊𝚛𝚒𝚊𝚋𝚕𝚎 𝚒𝚗 𝚜𝚎𝚊𝚕𝚎𝚍 𝚌𝚕𝚊𝚜𝚜
𝙴𝚗𝚞𝚖 𝚌𝚘𝚖𝚙𝚊𝚛𝚎𝚍 𝚠𝚒𝚝𝚑 𝚜𝚎𝚊𝚕𝚎𝚍 𝚌𝚕𝚊𝚜𝚜𝚎𝚜
𝚁𝚎𝚙𝚕𝚒𝚌𝚊𝚝𝚒𝚗𝚐 𝚝𝚑𝚎 𝚎𝚗𝚞𝚖 𝚏𝚞𝚗𝚌𝚝𝚒𝚘𝚗𝚊𝚕𝚒𝚝𝚢 𝚞𝚜𝚒𝚗𝚐 𝚜𝚎𝚊𝚕𝚎𝚍 𝚌𝚕𝚊𝚜𝚜𝚎𝚜

Summarizing the definition

• Sealed classes are collection of instances while the enum are the collection of values.
• Usage of when expression with enum.
• Limiting the hierarchy of classes.
• Can create multiple instances of sub-types.