Created by [CecilWesterhof].

I use tcl mostly for command-line tools. Often I want to output several empty lines. For this I created the following proc:

======
proc emptyLines {{lines 3}} {
    if {![string is integer -strict ${lines}]} {
        error "lines should be an integer (${lines})"
    }
    if {${lines} < 0} {
        error "lines cannot be negative (${lines})"
    }
    puts -nonewline [string repeat \n ${lines}]
}
======

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As always: comments, tips and questions are appreciated.

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[PYK] 2018-06-07:   All the input checking in this routine could be considered
bad style, as it is unnecessary.  `[string repeat]` already behaves reasonably
if `$count` is a negative number.  Also, this routine could have been placed
somewhere on an existing page.  It isn't significant enough to justify a new
page.  Furthermore, there isn't anything substantive enough about this
example to warrant being placed anywhere on the wiki at all.  Examples already
exist to cover what is illustrated here.

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