Doubt in while loop, code works fine

#1

Why in the code in while loop it is n>a and not n>0. I tried n>0 but then the pattern was not printed. By making n>a , the condition will eventually go false then how is the program still running. Please explain this since I’m not able to get this part of the code.

#2

@rg361 Don’t think about (n > a) or (n > 0). If you remove while loop like shown below then also answer is correct . Its bcoz a gets changed according to n in the for loops thats why No need to use a while loop.

import java.util.Scanner;

class Main {

	public static void main(String[] args)
    {

        Scanner scn = new Scanner(System.in) ;
        int n = scn.nextInt();
        int a=0;
        int b=1;
        int c;
        if(0 < n && n < 100)
        {
        
        for(int i=1;i<=n;i++)
        {     	
			for(int j=1;j<=i;j++)
        	{
        		System.out.print(a+"\t");
        		c=a+b;
        		a=b;
        		b=c;
        		
        	}
			System.out.println();
        }
        }
        else
        {
        	System.out.println("try again");
        }
    }
}
#3

okay sir, got it. Thanks

#4

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