Range

Similar to slices and maps, channels can be ranged over.

for item := range ch {
    // item is the next value received from the channel
}

This example will receive values over the channel (blocking at each iteration if nothing new is there) and will exit only when the channel is closed.

Assignment

It's that time again, Mailio is hiring and we've been assigned to do the interview. For some reason, the Fibonacci sequence is Mailio's interview problem of choice. We've been tasked with building a small toy program we can use in the interview.

Complete the concurrrentFib function. It should:

• Create a new channel of ints
• Call fibonacci in a goroutine, passing it the channel and the number of Fibonacci numbers to generate, n
• Use a range loop to read from the channel and print out the numbers one by one, each on a new line