Question

Is there a foreach construct in the Go language?
Can I iterate over a slice or array using a for?

Answer 1

From For statements with range clause:

A "for" statement with a "range" clause iterates through all entries
of an array, slice, string or map, or values received on a channel.
For each entry it assigns iteration values to corresponding iteration
variables and then executes the block.

As an example:

for index, element := range someSlice {
    // index is the index where we are
    // element is the element from someSlice for where we are
}

If you don’t care about the index, you can use _:

for _, element := range someSlice {
    // element is the element from someSlice for where we are
}

The underscore, _, is the blank identifier, an anonymous placeholder.