In Go+ there is no foreach loop instead, the for loop can be used as “foreach“. There is a keyword range, you can combine for and range together and have the choice of using the key or value within the loop.

The for-range Statement

What makes a for-range loop interesting is that you get two loop variables. The first variable is the position in the data structure being iterated, while the second is value at that position. The idiomatic names for the two loop variables depend on what is being looped over. When looping over an array, slice, or string, an i for index is commonly used. When iterating through a map, k (for key) is used instead.

The second variable is frequently called v for value, but is sometimes given a name based on the type of the values being iterated.

If you don’t need to access the key, use an underscore (_) as the variable’s name. This tells Go+ to ignore the value.

Iterating Over Maps

There’s something interesting about how a for-range loop iterates over a map.