Notes

// ****************************************************************
// PowersOf2.java
//
// Print out as many powers of 2 as the user requests
// ****************************************************************
import java.util.Scanner;

public class PowersOf2JS
{
public static void main(String[] args)
{
int numPowersOf2; //How many powers of 2 to compute
int nextPowerOf2 = 1; //Current power of 2
int exponent=0; //Exponent for current power of 2 -- this
//also serves as a counter for the loop
Scanner scan = new Scanner(System.in);

System.out.println("How many powers of 2 would you like printed?");
numPowersOf2 = scan.nextInt();

//print a message saying how many powers of 2 will be printed
//initialize exponent -- the first thing printed is 2 to the what?

System.out.println("Here are the first " + numPowersOf2 + " powers of 2:");
while (exponent < numPowersOf2)
{

System.out.println("2^" + exponent + " = " + nextPowerOf2);
nextPowerOf2 = (nextPowerOf2 * 2);
exponent++;

}

//print out current power of 2
//find next power of 2 -- how do you get this from the last one?
//increment exponent }