# Basics Calculations in R Language

- The assignment operators are the left arrow with dash <- and equal sign =.

> x = 20 assigns the value 20 to x.
Initially only <- was available in R.

> x = 20 assigns the value 20 to x.
> y = x + 2 assigns the value 2 * x to y.
> z = x + y assigns the value x + y to z.

# : The character # marks the beginning of a comment. All characters until the end of the line are ignored.
> # mu is the mean
> # x <- 20 is treated as comment only.

Capital and small letters are different.
> x <- 20 and > x <- 20 are different
The command c (1,2,3,4,5) combines the numbers 1,2,3,4 and 5 to a vector.

R as a calculator > 2 + 3              # Command
 5                  # Output

> 2 * 3              # Command
  6                 # Output

Multiplication and Division x * y , x/y

> c ( 2,3,5,7) * 3
   6 9 15 21

Addition and Subtraction x + y , x - y

> (2,3,5,7) + 10
 12 13 15 17

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