The data types required by the arguments of an MCL functions are specified by the following prefixes:
| Prefix | Data type required | Example | 
| n | Numeric | nRaces | 
| c | Character | cIncluding | 
| f | MCL Condition | 'fCondition' | 
| d | Date | dDate | 
| l | Logical | lTrueOrFalse | 
| e | Arguments that accept more than one data type | eDefaultVal | 
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