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.