Julia: High Performance Programming

Repeated evaluation

Julia has a for loop for iterating over a collection or repeating some code a certain number of times. You can use a while loop when the repetition depends on a condition and you can influence the execution of both loops through break and continue.

The for loop

We already encountered the for loop when iterating over the elements e of a collection coll (refer to the Strings and Ranges and Arrays sections in Chapter 2, Variables, Types, and Operations). This takes the general form:

# code in Chapter 4\repetitions.jl
for e in coll
   # body: process(e) executed for every element e in coll
end

Here, coll can be a range, a string, an array, or any other iterable collection (for other uses, also refer to Chapter 5, Collection Types). ...