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Full Discussion: Need a little help with functions
Top Forums Shell Programming and Scripting Need a little help with functions Post 302314820 by Glowworm on Sunday 10th of May 2009 01:42:19 PM
Old 05-10-2009
Wow, Thanks for the reply Franklin52, that certainly does the trick. I did actually see an example similar to that but I took it to be similar to that of a void function in other languages.

I am still a bit confused here. I have used echo to output to the screen before but does it actually cause a return when used in the context of a function. The value, or maybe even a string appears to be assigned to the result variable and even outputs as I did a bit of tinkering around with it to see if I could figure it out myself.

Could somebody walk me through the first iteration of the loop here (as the first and second are the easiest). First 0 is passed as the first argument and assigned to n. As 0 is less than or equal to 1 then echo $n (in this case 0). It doesn't output at this point, but in fact appears to return and assign it to the result variable. Is this what is actually happening or could somebody clarify it a bit for me?

I have seen functions with multiple echo statements following each other, so I'm pretty sure it doesn't cause a return. This just baffles me.
 

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LEARN ABOUT SUNOS

noecho

echo(3XCURSES)						  X/Open Curses Library Functions					    echo(3XCURSES)

NAME

       echo, noecho - enable/disable terminal echo

SYNOPSIS

       cc [ flag... ] file... -I /usr/xpg4/include -L /usr/xpg4/lib 
       -R /usr/xpg4/lib -lcurses [ library... ]

       c89 [ flag... ] file... -lcurses [ library... ]

       #include <curses.h>

       int echo(void);

       int noecho(void);

DESCRIPTION

       The  echo()  function enables Echo mode for the current screen. The noecho() function disables Echo mode for the current screen. Initially,
       curses software echo mode is enabled and hardware echo mode of the tty driver is disabled. The echo() and noecho() functions control  soft-
       ware echo only. Hardware echo must remain disabled for the duration of the application, else the behavior is undefined.

RETURN VALUES

       Upon successful completion, these functions return OK. Otherwise, they return ERR.

ERRORS

       No errors are defined.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |Unsafe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       getch(3XCURSES), getstr(3XCURSES), initscr(3XCURSES), libcurses(3XCURSES), scanw(3XCURSES), attributes(5), standards(5)

SunOS 5.10							    5 Jun 2002							    echo(3XCURSES)
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