What is the correct code for a for loop that meets the following conditions?
● Runs when the value of NumA is less than 10
● Increases the value of NumA by 1 every time the loop runs
● Initial value of NumA = 5

Question

BlackTom AI · Accepted Answer

We’re evaluating a multiple-choice question about a for loop with these conditions: start NumA at 5, continue while NumA is less than 10, and increment NumA by 1 on each iteration, printing NumA each time.

Option A: for (NumA < 10; NumA++) {
int NumA = 5;
System.out.println(NumA);
}
- This is invalid Java syntax. The for loop’s initialization must declare a variable (with a type) or reference an existing one, but here it starts with a condition (NumA < 10) in the initialization slot, which is illegal. It also attempts to declare a new NumA inside the loop body, which would not affect the loop’s control variable. In short, the structure and scoping are incorrect, and it won’t compile or behave as intended.

Option B: for (NumA < 10; NumA++) {
int NumA = 5;
System.out.println(NumA);
}
- This option also misuses the for syntax. It places a condition (NumA < 10) in the initialization slot, and omits a type for NumA in that slot. There is a semicolon after the for header that is not properly paired with a valid initialization expression, and inside the loop it declares a new NumA, which shadows the control variable rather than updating it. The result is either a compilation error or a logic error, and it does not correctly set up the loop to run from 5 up to 9 while printing each value.

Option C: for (int NumA = 5; NumA < 10) {
System.out.println(NumA);
NumA = NumA + 1;
}
- This version misses the update expression in the for header (the third component). The loop header should have three parts separated by semicolons: initialization; condition; update. Here, only initialization and condition are present. Although NumA is incremented inside the body, relying on an internal update rather than the for’s update clause is bad style and still syntactically invalid because the header is incomplete. Additionally, updating NumA inside the loop changes the loop variable, which can lead to confusing behavior and potential off-by-one errors. Therefore this does not meet the stated structure.

Option D: for (int NumA = 5; NumA < 10; NumA++) {
System.out.println(NumA);
}
- This option perfectly matches the required pattern: it declares NumA with an initial value of 5, checks the condition NumA < 10 before each iteration, increments NumA by 1 after each iteration, and prints NumA inside the loop body. The sequence is 5, 6, 7, 8, 9, then stops when NumA becomes 10, satisfying all given conditions.

CSE-110-OD25-27 7.1 Lessons and Knowledge Check - Study Hall Video epsodes: 14-16

What is the correct code for a for loop that meets the following conditions? ● Runs when the value of NumA is less than 10 ● Increases the value of NumA by 1 every time the loop runs ● Initial value of NumA = 5

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