: Javascript. Tree of hash char I'm newbie in javascript. I'm trying to do a tree of hash ("#") in javascript. The output I would to have is something like: # ## ### #### ##### ###### ####### I

@Jamie184

Modifying your existing code, try the following:

var s = "#######";
for (i = 0; i <s.length; i++) {
console.log(s.substring(0,i));
}


The substring() method of the string object (ie. your var s) returns a portion of the string starting at 0 (the first char) and ending at i, which increases by 1 for each iteration of your for() loop.


But I don't understand how can decrement the char


Should be increment.

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