Android For loop

Question

I have the following code...

String t = " "; 
for(int l=0; l<=5; l++){
    t = "Num: " + l + "\n";
}

VarPrueba.setText(t);

I am wanting to loop through a set of numbers, and generate a String that lists them all at the end. The output should be something like this...

Could someone please help me understand how to correct my code.

First of all this loop runs 6 times and not 5 :) either change the start parameter to 1 or the end condition to < — Benjamin Gruenbaum
– Benjamin Gruenbaum, Commented Jun 21, 2012 at 2:04
Do you want it to show the number for each time the loop processes or all in one block at the end ? — Russ Clarke
– Russ Clarke, Commented Jun 21, 2012 at 2:04

plucury · Accepted Answer · 2012-06-21 02:13:52Z

23

Change as follow:

t+="Num: " + l + "\n";

And the most effective way to do this is to using StringBuilder, Something like:

StringBuilder t = new StringBuilder(); 
for(int l=0; l<=5; l++){
    t.append("Num:");
    t.append(l+"\n");
}

VarPrueba.setText(t.toString());

answered Jun 21, 2012 at 2:03

plucury

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1 Comment

+1 StringBuilder is much better for memory. Otherwise you create a new string every time you iterate through the loop.