Columns: city, units, mm.

Goal

Print the Nairobi row.

df <- data.frame(
  city = c("Nairobi", "Mombasa", "Kisumu"),
  units = c(12, 8, 5),
  mm = c(85, 40, 120),
  stringsAsFactors = FALSE
)
print(df)
print(df$city)

df <- data.frame(
  city = c("Nairobi", "Nakuru"),
  units = c(12, 4),
  stringsAsFactors = FALSE
)
print(df[1, ])

df <- data.frame(
  city = c("Kisumu", "Eldoret"),
  mm = c(120, 90),
  stringsAsFactors = FALSE
)
print(nrow(df))
print(names(df))

df <- data.frame(city = "Mombasa", units = 8, stringsAsFactors = FALSE)
print(df$units)