All Computer Programming Language follow the same definition of a reserved word. A reserved word is a word that cannot be used as an identifier, such as the name of a variable, function or label – it is “reserved from use”. R Programming Language also have its list of reserved words.
| If | Else | Repeat | While | Function |
| For | In | Next | Break | True |
| False | Null | InF | NaN | NA |
| NA_Integer | NA_real_ | NA_complex_ | NA_character_ |
- If, else, repeat, while, function, for, in next, break – used for Loops, conditions and user defined functions
- TRUE, FALSE – used as logical constants
- NULL – used for undefined values
- InF – used for Infinity
- NaN – used for Not a Number
- NA – used for Not Available values
To view the list of reserved words in R, in R Console command prompt type
- > ?Reserved
- Help(reserved)
Both command will redirect you to the manual pages of documentation