> rnorm
function (n, mean = 0, sd = 1) 
.Internal(rnorm(n, mean, sd))
<environment: namespace:stats>
e.g. 
> rnorm(5,5,0.01)
[1] 4.988238 5.001168 4.999970 4.995600 4.986038

> a=1:20
> a
 [1]  1  2  3  4  5  6  7  8  9 10 11 12 13 14 15 16 17 18 19 20