[swift-users] How to print formated "%.9f" Double? Swift 2.2 ?

[Isaac Gouy]

For example,

   print( String(format: "%.3f", 1.23489) )

   $ /usr/local/src/swift-2.2-SNAPSHOT-2015-12-01-b-ubuntu15.10/bin/swiftc test.swift

   $ ./test
   ("%.3f", 1.23489)

Not 1.235