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R uses <- for assignment by convention (also = works, but <- is the idiomatic R style).

x <- 5
name <- "Ada"
pi_value <- 3.14159

R has these basic types:

• numeric — double-precision floats (the default for numbers)
• integer — append L: 42L
• character — strings, double or single quotes
• logical — TRUE, FALSE (or T, F)
• NA — missing value (one per type, e.g. NA_integer_)
• NULL — absence of value

class(x) tells you the type. typeof(x) is more granular.

x <- 5
class(x)        # "numeric"
class(5L)       # "integer"
class("hi")     # "character"