Flow and Data

Branches

Choosing a Path

An if statement chooses which block runs. The condition is a logical value computed from current data.

Program

Play the script to watch a score choose the passing branch.

branches.R 
score <- 82
if (score >= 80) {
  grade <- "pass"
} else {
  grade <- "retry"
}
cat(grade, "\n", sep = "")
if `if (condition)` runs the following block only when the condition is `TRUE`.
comparison `score >= 80` returns a logical value.
else `else` gives the fallback path when the condition is `FALSE`.