## stride

`func stride(from:to:by:)(from start: T, to end: T, by stride: T.Stride) -> StrideTo<T>`

Returns a sequence from a starting value to, but not including, an end value, stepping by the specified amount.

You can use this function to stride over values of any type that conforms to the `Strideable` protocol, such as integers or floating-point types. Starting with `start`, each successive value of the sequence adds `stride` until the next value would be equal to or beyond `end`.

``````for radians in stride(from: 0.0, to: .pi * 2, by: .pi / 2) {
let degrees = Int(radians * 180 / .pi)
}
``````

You can use `stride(from:to:by:)` to create a sequence that strides upward or downward. Pass a negative value as `stride` to create a sequence from a higher start to a lower end:

``````for countdown in stride(from: 3, to: 0, by: -1) {
print("\(countdown)...")
}
// 3...
// 2...
// 1...
``````

If you pass a value as `stride` that moves away from `end`, the sequence contains no values.

``````for x in stride(from: 0, to: 10, by: -1) {
print(x)
}
// Nothing is printed.
``````
`func stride(from:through:by:)(from start: T, through end: T, by stride: T.Stride) -> StrideThrough<T>`

Returns a sequence from a starting value toward, and possibly including, an end value, stepping by the specified amount.

You can use this function to stride over values of any type that conforms to the `Strideable` protocol, such as integers or floating-point types. Starting with `start`, each successive value of the sequence adds `stride` until the next value would be beyond `end`.

``````for radians in stride(from: 0.0, through: .pi * 2, by: .pi / 2) {
let degrees = Int(radians * 180 / .pi)
}
``````

You can use `stride(from:through:by:)` to create a sequence that strides upward or downward. Pass a negative value as `stride` to create a sequence from a higher start to a lower end:

``````for countdown in stride(from: 3, through: 1, by: -1) {
print("\(countdown)...")
}
// 3...
// 2...
// 1...
``````

The value you pass as `end` is not guaranteed to be included in the sequence. If stepping from `start` by `stride` does not produce `end`, the last value in the sequence will be one step before going beyond `end`.

``````for multipleOfThree in stride(from: 3, through: 10, by: 3) {
print(multipleOfThree)
}
// 3
// 6
// 9
``````

If you pass a value as `stride` that moves away from `end`, the sequence contains no values.

``````for x in stride(from: 0, through: 10, by: -1) {
print(x)
}
// Nothing is printed.
``````