Whiting, Sue, Sam Wass, Simon Green, and Michael Thomas. ‘Stress and Learning in Pupils: Neuroscience Evidence and Its Relevance for Teachers’. Preprint. PsyArXiv, 4 August 2020. https://doi.org/10.31234/osf.io/9j24a.

sequence of python statements intended to do something... like solve a problem :)

output <- vector("double", ncol(mtcars))  # 1. output
for (i in seq_along(mtcars)) {            # 2. sequence
  output[[i]] <- mean(mtcars[[i]])      # 3. body
}