Range Over Built in Julia

Based on your input, the target language is Julia. Below is the translated Go code into Julia, along with the corresponding explanations.

Range over Built-in Types#

range iterates over elements in a variety of built-in data structures. Let’s see how to use range with some of the data structures we’ve already learned.

Here we use range to sum the numbers in an array. Arrays work like this too.

nums = [2, 3, 4]
sum = 0
for num in nums
    sum += num
end
println("sum:", sum)

range on arrays and slices provides both the index and value for each entry. Above we didn’t need the index, so we ignored it. Sometimes we actually want the indexes though.

for (i, num) in enumerate(nums)
    if num == 3
        println("index:", i)
    end
end

range on dictionaries iterates over key/value pairs.

kvs = Dict("a" => "apple", "b" => "banana")
for (k, v) in kvs
    println("$k -> $v")
end

range can also iterate over just the keys of a dictionary.

for k in keys(kvs)
    println("key:", k)
end

range on strings iterates over Unicode code points. The first value is the starting byte index of the character and the second the character itself.

for (i, c) in enumerate("go")
    println(i-1, ' ', c) # (i-1) to convert 1-based index to 0-based
end

To run the program, you can simply use Julia’s interactive session or save the code in a .jl file and run it using the Julia command:

$ julia range_over_built_in_types.jl

Expected Output:

sum: 9
index: 2
a -> apple
b -> banana
key: a
key: b
0  g
1  o

Next example: Pointers.