1. Values and variable

#integer
x <- 6
sprintf("x is %s ", x)

## [1] "x is 6 "

print(class(x))

## [1] "numeric"

#float

x <- 6.8
sprintf("x is %s ", x)

## [1] "x is 6.8 "

print(class(x))

## [1] "numeric"

#String

x <- '6.8'
sprintf("x is %s ", x)

## [1] "x is 6.8 "

print(class(x))

## [1] "character"

#bool

x <- TRUE
sprintf("x is %s ", x)

## [1] "x is TRUE "

print(class(x))

## [1] "logical"

#None: NULL, NA, NaN, Inf

x <- NULL
sprintf("x is %s ", x)

## character(0)

print(class(x))

## [1] "NULL"