explode a string function gets an undefined result

Newsgroups	comp.lang.javascript
Date	2015-09-06 18:03 -0700
Message-ID	<f938f9dd-e322-4370-bc80-379ea36b83aa@googlegroups.com> (permalink)
Subject	explode a string function gets an undefined result
From	JRough <janis.rough@gmail.com>

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var str = 'janis';
var myfunc = function explode(str){
for (var i=0, out; i< str.length; i++){
out = out + " " + str.charAt(i);
    
}
   alert(out);
}
output = myfunc(str);


why is the result "undefined j a n i s???, thanks

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explode a string function gets an undefined result JRough <janis.rough@gmail.com> - 2015-09-06 18:03 -0700
  Re: explode a string function gets an undefined result Tim Streater <timstreater@greenbee.net> - 2015-09-07 09:37 +0100
  Re: explode a string function gets an undefined result Stefan Weiss <krewecherl@gmail.com> - 2015-09-07 14:26 +0200
    Re: explode a string function gets an undefined result Tim Streater <timstreater@greenbee.net> - 2015-09-07 15:58 +0100
  Re: explode a string function gets an undefined result JRough <janis.rough@gmail.com> - 2015-09-08 14:29 -0700
    Re: explode a string function gets an undefined result "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2015-09-09 00:01 +0200
      Re: explode a string function gets an undefined result Stefan Weiss <krewecherl@gmail.com> - 2015-09-09 00:50 +0200
        Re: explode a string function gets an undefined result "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2015-09-09 09:19 +0200
        Re: explode a string function gets an undefined result JRough <janis.rough@gmail.com> - 2015-09-09 10:30 -0700
    Re: explode a string function gets an undefined result Tim Streater <timstreater@greenbee.net> - 2015-09-09 22:15 +0100

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