# Loops in Go

The basic loop in Go is written in standard C-like syntax:

```go
for INITIAL; CONDITION; AFTER{
  // do something
}
```

`INITIAL` is run once at the beginning of the loop and can create
variables within the scope of the loop.

`CONDITION` is checked before each iteration. If the condition doesn't pass
then the loop breaks.

`AFTER` is run after each iteration.

For example:

```go
for i := 0; i < 10; i++ {
  fmt.Println(i)
}
// Prints 0 through 9
```

## Assignment

At Textio we have a dynamic formula for determining how much a batch of bulk messages costs to send.

### Complete the `bulkSend()` function

This function should return the total cost (as a `float64`) to send a batch of `numMessages` messages. Each message costs `1.0`, plus an additional fee. The fee structure is:

* 1st message: `1.0 + 0.00`
* 2nd message: `1.0 + 0.01`
* 3rd message: `1.0 + 0.02`
* 4th message: `1.0 + 0.03`

Use a loop to calculate the total cost and return it.