Great job! Have you noticed how R displayed a vector? It broke the long vector into multiple lines so you could see all values. Each line is preceded by the position of the element that happens to be at the beginning of the line. This position is denoted in brackets. You probably remember that R displays single values in the same way. That's because single values in R are vectors. If you create a variable named
height <- 172
R creates a one-element vector. This is why R displays
 before the value, it means it's a vector.
You can create a one-element vector with the
c() function as well:
height <- c(172)
This vector is the same as the one created with single-value assignment.