What will be the output of the following code: int i = 1, j = 10; do { if(i > j) { break; } j--; } while (++i < 5); System.out.println("i = " + i + " and j = " + j);
Understand the Problem
The question is asking for the output of a provided Java code snippet involving a do-while loop, conditionals, and variable manipulation. The user needs to analyze the code to determine the final values of the variables i
and j
when the program completes execution.
Answer
$i = 6$ and $j = 5$.
Answer for screen readers
The output of the program will be: $i = 6$ and $j = 5$.
Steps to Solve
-
Initialize Variables Set the initial values: $i = 1$ and $j = 10$.
-
First Iteration of the Loop The code enters the
do-while
loop. Since $i \leq j$, thebreak
statement is not executed.
- Decrement $j$: $j = j - 1 \Rightarrow j = 9$
- Increment $i$: $i = i + 1 \Rightarrow i = 2$
- Second Iteration of the Loop The loop runs again with $i = 2$ and $j = 9$.
- No
break
; continue to decrement $j$: $j = 8$ - Increment $i$: $i = 3$
- Third Iteration of the Loop Now $i = 3$ and $j = 8$.
- No
break
; decrement $j$: $j = 7$ - Increment $i$: $i = 4$
- Fourth Iteration of the Loop With $i = 4$ and $j = 7$.
- Still no
break
; decrement $j$: $j = 6$ - Increment $i$: $i = 5$
- Fifth Iteration of the Loop The loop checks with $i = 5$ and $j = 6$.
- The
break
is not reached yet. Decrement $j$: $j = 5$ - Increment $i$: $i = 6$
- Exit Loop Now on the next check, $i = 6$ and $j = 5$.
- Here, $i > j$, which triggers the
break
statement, exiting the loop.
- Final Output Finally, print the values of $i$ and $j$:
System.out.println("i = " + i + " and j = " + j);
The output of the program will be: $i = 6$ and $j = 5$.
More Information
This code demonstrates how a do-while
loop executes its body before checking the condition, allowing for controlled manipulation of variables through updates, loops, and conditionals.
Tips
- Misunderstanding the
do-while
loop, leading to incorrect assumptions about the order of operations. - Forgetting that the increment of $i$ occurs after the
if
condition, which can change the flow of the program unexpectedly.
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