method
Udp.open
Udp.open(port) -> int
Opens a non-blocking IPv4 socket bound to port on every interface and returns its handle, or 0 when it could not. Port 0 lets the system pick a free one; Udp.port says which.
Example
program Demo {
entry {
let s = Udp.open(port: 0)
print(s > 0)
}
}