Trace the Code
int x = 5;
x = x + 3;
System.out.println(x);
What will print in this code?
It's eight.
The variable x is 5. The statement x = x + 3 adds 3 to the value of x, making it 8. The program then prints the updated value.
for (int i = 0; i < 3; i++) {
System.out.println("Hello");
}
How many times will “Hello” be printed?
It’s three times.
The loop starts at i = 0 and runs while i < 3. Each loop prints once so the loop runs 3 times.
int score = 85;
if (score >= 60) {
System.out.println("Pass");
} else {
System.out.println("Fail");
}
What will it print?
It’s Pass.
The condition checks if score is at least 60. Since 85 meets the condition, the if block runs instead of the else.
int a = 2;
int b = a * 4;
b = b - 3;
System.out.println(b);
What will it be printed?
It’s five
The value of a is 2 so b becomes 2 * 4 = 8. So 3 is subtracted from b, and it becomes 5.
int sum = 0;
for (int i = 1; i <= 4; i++) {
sum = sum + i;
}
System.out.println(sum);
What will it print?
It’s ten.
The loop adds numbers 1 through 4 to sum. This use accumulation logic:
1 + 2 + 3 + 4 = 10.
int num = 7;
if (num % 2 == 0) {
System.out.println("Even");
} else {
System.out.println("Odd");
}
What will it print?
It’s Odd.
The modulus operator checks if there is a remainder when dividing by 2. Since 7 has a remainder the condition is false and the else block is removed.
int num = 10;
if (num > 5) {
num = num - 2;
}
System.out.println(num);
What will it print?
It’s eight.
The condition num > 5 is true so the code inside the if statement runs. The value of num is less by 2.
int count = 5;
while (count > 0) {
System.out.print(count + " ");
count--;
}
What will it print?
5 4 3 2 1
The loop continues while the condition count > 0 is true. Each prints the current value and then lowers it. This shows how loop conditions control repetition.
int x = 10;
if (x < 5) {
System.out.println("A");
} else if (x < 15) {
System.out.println("B");
} else {
System.out.println("C");
}
What will it print?
It’s B
The first condition is false, but the second condition is true. The program stops checking once a true condition is found. Showing conditional branching logic.