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Thread: Operator Problem

  1. #1
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    Default If Else Problem

    See post blow.
    Last edited by KevinGreen; October 31st, 2009 at 07:28 PM.


  2. #2
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    Default Re: Operator Problem

    After much screaming, I get them to sort out a little; but I'm having trouble with the print. I want:

    Line 1: 2, 4, 6, 8...
    Line 2: 22, 24, etc etc.

    How do I insert the Line 1: text in the if else format, without causing the if else to print line 1 for every number it kicks out?

    public class EvenNums {
     
        public static void main(String[] args) throws Exception {
            int i = 2;
            int limit1 = 21;
            int limit2 = 41;
            int limit3 = 61;
            int limit4 = 81;
     
            for (i = 2; i < 100; i++) {
                if ((i % 2) == 0 && i < limit1) {
                    System.out.print(i);
                } else if ((i % 2) == 0 && i < limit2) {
                    System.out.print(i);
                } else if ((i % 2) == 0 && i < limit3) {
                    System.out.print(i);
                } else if ((i % 2) == 0 && i < limit4) {
                    System.out.print(i);
                }
            }
        }
    Last edited by KevinGreen; October 31st, 2009 at 07:28 PM.

  3. #3
    Super Moderator copeg's Avatar
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    Default Re: Operator Problem

    If I understand your question correctly: your for loop can be written differently and increment by 2 rather than 1. This would remove having to use modulus to check for even numbers. You can create a small look up table to print the lines. Of course new lines and commas need to be added to the appropriate places get the output you want.
     
    String line[] = {"Line 1: ", "Line 2: ", "Line 3: ", "Line 4: ", "Line: 5 "};
     
    int mark = 0;
     
    for (int i = 2; i < 100; i+=2) {
    	if ( i % 20 == 2 ){
    		System.out.print(line[mark]);
    		mark++;
    	}
    	System.out.print(i);
    	System.out.print(" ");
    }

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