Operator Problem

**KevinGreen** · October 31st, 2009, 06:22 PM

See post blow.

**KevinGreen** · October 31st, 2009, 07:05 PM

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);
            }
        }
    }

**copeg** · November 2nd, 2009, 09:50 AM

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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