What are primary Data Types?

There are 5 primary data types supported in R.

1. Character - Character data type represents a sequence of characters as shown below:

> s = "Hello World!"

> print(s)
[1] "Hello World!"

> is.character(s)
[1] TRUE

> typeof(s)
[1] "character"

2. Numeric (or Double) - Numeric data type represents a numeric value as shown below:

> n = 3
> is.numeric(n)
[1] TRUE

> typeof(n)
[1] "double"

> pi = 3.14
> is.numeric(pi)
[1] TRUE

3. Integer - Integer data type represents an integer value as shown below. Note that no easy way to enter an integer literal. You can use the as.integer() conversion function to convert a given value into an integer.

> n = 3
> is.integer(n)
[1] FALSE

> i = as.integer(3)
> is.integer(i)
[1] TRUE

> typeof(i)
[1] "integer"

4. Complex - Complex data type represents a complex value as shown below.

> c = 2 + 2i

> print(c)
[1] 2+2i

> is.complex(c)
[1] TRUE

> typeof(c)
[1] "complex"

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