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The <- operator for the assignment will work in any context while the = operator only works for complete expressions. Another option is to use the <<- operator. The advantage of the <<- operator is that it instructs the R environment to search parent environments to see whether the variable already exists.
In some contexts, within a function for example, the <- operator will create a new variable; however, the <<- operator will make use of an existing variable outside of the function if it is found.
Here, we briefly list some of the built-in data types that describe discrete data. The four data types discussed are the integer, logical, character, and factor data types.
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