Question 1:

(1)

  x=5;
  while(x>0)
  { 
    System.out.println("X is x"+x);
    x++;
  }

 Output:
  error - infinite loop
  X is 5
  X is 6
  .
  .
  .


 for(x=5;x>0;x++) 
  System.out.println("X is x"+x);


 x=5;
 do
 { 
   System.out.println("X is x"+x);
   x++;
 } while(x>0); 


(2)

 int i=5, n=6, sum=50;
 while (i<n)
 {
   sum +=i;
   System.out.println("sum=" +sum);
   i++;
 }

 Output:
     sum=55

 int i=5, n=6, sum=50;
 do
 {
   sum +=i;
   System.out.println("sum=" +sum);
   i++;
 } while (i<n);

 
 int n=6, sum=50;
 for(int i=5;i<n; i++)
 {
   sum +=i;
   System.out.println("sum=" +sum);
 }


(3)

  for(int x=0;x>7;x++)
     System.out.println("X is"+x);

  Output:  
     loop will not execute

  int x=0;
  while(x>7)
  {
     System.out.println("X is"+x);
     x++;
  }


  int x=0;
  do
  {
     System.out.println("X is"+x);
     x++;
  } while(x>7);

      
-----------------------------------------------------------

Question 2:

public class Calculate
{
  public static void main (String [] args) 
  {
   double a,x;
   double F;
   
   System.out.println("a = ");
   a = double.parseDouble(stdin.readLine());

   System.out.println("x = ");
   x = double.parseDouble(stdin.readLine());

   F = 1 - Math.exp(-a*x);

   System.out.println("value of F : "+F);
  }
}


---------------------------------------------------------------

Question 3: 

 int M=44;
 int N=28;
 while(M!=N)
 {
  while(M>N)
    M = M-N;    // M-=N;
  while(M<N)
    N = N-M;    // N-=M;  
  System.out.println("M="+M);
 }

 M    N              Output
 44   28             M=16
 16   28             M=4
 16   12             M=4
 4    12
 4    8
 4    4

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Question 4

Array operations

see assignment.pdf file


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