|<- <- -> ->|

Errors and Streams

    [jao@zack]$ osh gen 5 ^ f 'x: (x, x / (x - 2))' ^ out
    (0, 0)
    (1, -1)
    ERROR: ("_F#3['x: (x, x / (x - 2))']", (2,), 
            'integer division or modulo by zero')
    (3, 3)
    (4, 2)

– Division by zero causes error.

– Pipe carries multiple streams:

     o: For normal output.

     e: For error output.