Control structures

Just like the Python programming language, Vyper also has control structures, such as if and for, but with some restrictions compared to Python.

Let’s create a Vyper file, named ControlStructures.vy, and add the following code to it:

# @version ^0.3.0
@external
@pure
def sum() -> int128:
    s: int128 = 0
    for i in [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]:
        s += i
    return s
@external
@pure
def greet(time: String[10]) -> String[20]:
    if time == "morning":
        return "Good morning!"
    elif time == "evening":
        return "Good evening!"
    else:
        return "How are you?"

As you can see, the way you use...