Computer Applications
Analyze the following program segment and determine how many times the loop will be executed. What will be the output of the program segment?
int k=1,i=2;
while(++i<6)
k*=i;
System.out.println(k);
Java
Java Iterative Stmts
ICSE 2010
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Answer
60
The loop executes 3 times.
Working
This table shows the change in values of i and k as while loop iterates:
| i | k | Remarks |
|---|---|---|
| 2 | 1 | Initial values |
| 3 | 3 | 1st Iteration |
| 4 | 12 | 2nd Iteration |
| 5 | 60 | 3rd Iteration |
| 6 | 60 | Once i becomes 6, condition is false and loop stops iterating. |
Notice that System.out.println(k); is not inside while loop. As there are no curly braces so only the statement k *= i; is inside the loop. The statement System.out.println(k); is outside the while loop, it is executed once and prints value of k which is 60 to the console.
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