A computer science problem by Raj Maiti

Computer Science Level 2

Observe the following coding in java and find how many times will "And it's good!" printed when disp(5) -- 

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         class r{ 
           public void disp(int a)
          {
          if (a>0);
            {
             System.out.println("And it's good!");
               disp(a-1);
             }
            }
             }

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5 times 10 times infinite times 0 times

Raj Maiti by Raj Maiti , 23, India

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2 solutions

The method called by itself and the value disp(a-1) is changed any more!

0 Helpful 0 Interesting 0 Brilliant 0 Confused

No, it's because of the semicolon after the "if". It's a null statement. That means the program will print even if a<0, because the print isn't inside the if.

Kenny Lau - 6 years, 9 months ago
Sonali Srivastava
Jul 21, 2014

since value of a is never being changed hence it will print infinitely.Only disp(a-1) is being called,value of a is not updated.

0 Helpful 0 Interesting 0 Brilliant 0 Confused

No, it's because of the semicolon after the "if". It's a null statement. That means the program will print even if a<0, because the print isn't inside the if.

Kenny Lau - 6 years, 9 months ago

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