2.1 Data Type

There are five basic data types:

1. logical
2. integer
3. numeric
4. complex
5. character.

2.1.1 Logical

Logical data type can either be TRUE and FALSE. It corresponds to integer 0 and 1.

x <- TRUE
x

## [1] TRUE

y <- FALSE
y

## [1] FALSE

class(x)

## [1] "logical"

Note that We use the function class() to see the data type.

2.1.2 Integer

Integer data type covers all whole numbers. It is represented by number and letter L: 1L, 2L, 3L.

x <- 1L
x

## [1] 1

class(x)

## [1] "integer"

2.1.3 Numeric

Numeric data type covers all real numbers.

x <- 2.6
x

## [1] 2.6

class(x)

## [1] "numeric"

2.1.4 Complex

Complex data type covers all complex number.

x <- 2 +5i
x

## [1] 2+5i

class(x)

## [1] "complex"

2.1.5 Character

Character data type covers all text strings.

x <- "Hello World"
x

## [1] "Hello World"

class(x)

## [1] "character"