R Programming By Example

For loops

There are two important properties of for loops. First, results are not printed inside a loop unless you explicitly call the print() function. Second, the indexing variable used within a for loop will be changed, in order, after each iteration. Furthermore, to stop iterating you can use the keyword break, and to skip to the next iteration you can use the next command.

For this first example, we create a vector of characters called words, and iterate through each of its elements in order using the for (word in words) syntax. Doing so will take the first element in words, assign it to word, and pass it through the expression defined in the block defined by the curly braces, which in this case print the word to the console, as well ...