> # R MAY BE USED AS AN ORDINARY CALCULATOR
>
> 2 + 3 * 5 
[1] 17
> log (10)
[1] 2.302585
> 4^2 
[1] 16
> 3/2 
[1] 1.5
> sqrt (16) 
[1] 4
> abs (3-7)
[1] 4
>  pi 
[1] 3.141593
>  exp(2)  
[1] 7.389056
> 15 %/% 4  
[1] 3
>
> # ASSIGNMENT OPERATOR
>
> x<- log(2.843432) *pi 
> x
[1] 3.283001
> sqrt(x) 
[1] 1.811905
> floor(x)        # largest integer less than or equal to x
[1] 3
> ceiling(x)      # smallest integer greater than or equal to x