How the the program executed? how the output is 5? cant understand the part of y,z and print part

Question

What is the output of this code?

x <- data.frame(
"a" = c(7, 42, 3, 5),
"b" = c("a","b","c","d")
)
y <- subset(x, a < 10)
z <- max(y$a)

print(min(mean(y$a), z))

Answer 1

x stores the data in a table-like structure.

y is a subset of x: You only keep the table rows where "a" is smaller than 10.

print x and y and compare them

z is the max value in the "a"-column of y

solve the last line from inner to outer: mean gives the mean value of "a"-column in y. min gives the minimum: either the mean or z.