Programming Interview Questions on loops

Think Output:

Program #1:

1. package com.instanceofjavaforus;
2.  
3. public class Loops {
4.  
5. public static void main(String args[]){
6.  
7.             int i=0;
8.  
9.             for( i=0;i<5;i++){               
10.                 System.out.println(i);
11.              }
12.  
13.              System.out.println("value of i after completion of loop: "+i);
14. }
15. }

1. 0
2. 1
3. 2
4. 3
5. 4
6. value of i after completion of loop: 5

Program #2:

 

1. package com.instanceofjavaforus;
2.  
3. public class LoopsDemo2 {
4.  
5. public static void main(String args[]){
6.  
7.           int a=0,b=0;
8.  
9.             for(int i=0;i<5;i++){
10.                 if(++a>2||++b>2){
11.                    a++;
12.                   }
13.           }
14.  
15.           System.out.println("a= "+a+" b="+b);
16.         
17. }
18. }

1. a= 8
2. b= 2

Program #3:

1. package com.instanceofjavaforus;
2.  
3. public class LoopsDemo3 {
4.  
5. public static void main(String args[]){        
6. int i=5;
7. System.out.println(i++);
8. System.out.println(i--);
9. }
10. }

1. 5
2. 6