Julia 1.0 Programming Complete Reference Guide

Iteration

The simplest way to iterate over an array is with the for construct:

for element in yourarray 
    # do something with element 
end 
 

Here's an example:

julia> for person in ["Alison", "James", "Cohen"] 
           println("Hello $person") 
       end 
 
Hello Alison 
Hello James 
Hello Cohen 
 

If you also need the index while iterating, Julia exposes the eachindex(yourarray) iterator:

julia> people = ["Alison", "James", "Cohen"] 
3-element Array{String,1}: 
 "Alison" 
 "James" 
 "Cohen" 
 
julia> for i in eachindex(people) 
           println("$i. $(people[i])") 
       end 
1. Alison 
2. James 
3. Cohen