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Thread: My first code for computing a table of squares - and its not working :(

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    Default My first code for computing a table of squares - and its not working :(

    public class squares {
     
    	public static void main(String[] args) {
    		int i =1, j=1;
    		System.out.println (i);
    		while (j < 40)
    		{
    			i=i+1;
    			j=i*i;
    			System.out.println(j);
    		}   
     
    	}
     
    }


    The output prints the squares till 49 even though i have given j as 40..please help!
    Last edited by jps; August 24th, 2013 at 11:13 AM. Reason: code tags


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    Default Re: My first code for computing a table of squares - and its not working :(

    Please post your code in code tags.

    Changing the value of the loop control variable, in this case 'j', inside the loop is not a great idea. I recommend that you use another variable to compute the squares and print that, leaving 'j' alone.

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    Default Re: My first code for computing a table of squares - and its not working :(

    Thanks Greg
    Will try that..by the way changing the order of print ( printing at the start of the loop helped too )

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    Default Re: My first code for computing a table of squares - and its not working :(

    I have an explaination for your code.
    Your code makes sqaures indeed but what happens is that when the last square is made(i = 7 ; 7 * 7= 49) the loop will stop because j is over 40.
    If you want to stop the loop before it goes over 40 then you should use the square before 40 that is 36(6 * 6).
    Then you should test what the sqaure is going to be before it is going to print it.

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    Default Re: My first code for computing a table of squares - and its not working :(

    Hello.
    If you have time then using a pen and paper just trace your program line by line.
    You shall know what is causing the fault. And you may be able to fix it on your own.

    Syed.

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