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Updated README.md for Options #202

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Mar 20, 2024
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Updated README.md for Options #202

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Updated README.md for Options
fishonamos Mar 19, 2024
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Update README.md: Added markup to highlight language keywords
fishonamos Mar 20, 2024
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# Options

Type Option represents an optional value: every Option is either Some and contains a value, or None, and does not.
Option types are very common in Cairo code, as they have a number of uses:
Type **`Option`** represents an optional value: every **`Option`** is either **`Some`** and contains a value, or *`None`**, and does not.
**`Option`** types are very common in Cairo code, as they have a number of uses:

- Initial values
- Return values for functions that are not defined over their entire input range (partial functions)
- Return value for otherwise reporting simple errors, where None is returned on error
- Return value for otherwise reporting simple errors, where **`None`** is returned on error
- Optional struct fields
- Optional function arguments

## Further Information

- [Option Implementation](https://book.cairo-lang.org/ch06-01-enums.html#the-option-enum-and-its-advantages)