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Fuzion • Idioms • Idiom # 120: Read integer from stdin

Idiom # 120: Read integer from stdin

See programming-idioms.org:

Code

n := io.buffered.read_line ? str String => str.parse_int.val | io.end_of_file => panic "end of file"

What are effects?

Running Example

ex120 is
  say "please type a number:"

  # no error handling is performed here
  # program crashes if user does not type a number
  _ := io.stdin.with ()->
    n := io.buffered.read_line ? str String => str.parse_int.val | io.end_of_file => panic "end of file"

    say "got $n"

What are effects?

next: NYI: Idiom # 121: UDP listen and read