Thread: do-while loop help

I'm having trouble figuring out why my do-while loop isn't fully working. As you can see, it will loop for the first 2 values of i (1 and 2), but then after that
if i doesn't fit in my if or if-else statements, the loop stops. Any help or suggestions?

	int iterationNum = 1;
					int cycle = 0;
					double denominator = 1.0;
					double pi = 0.0;		
					double validPrint;
					int n = 1;
		do {
						pi += (4.0 * Math.pow(-1.0, cycle))/denominator;
						validPrint = Math.pow(iterationNum, (1/n));
						if(iterationNum == 1){					
							System.out.print("\ni=" + iterationNum + " " + " pi=" + pi +
									"\tcontinue (y|n)?");	
 
						}
						else if(validPrint == 2){
							System.out.print("\ni=" + iterationNum + " " + " pi=" + pi +
									"\tcontinue (y|n)?");
							n++;
 
						}
 
							iterationNum++;
							denominator = (denominator + 2.0);
							cycle++;
 
 
						}while(iterationNum < 400);

Output:


i=1 pi=4.0 continue (y|n)?
i=2 pi=2.666666666666667 continue (y|n)? //code randomly stops here
My First Program can do many things!
1. Estimate population(goes back to menu like it should after the loop fully ends.)

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