The correct answer is: A. while
A while loop is a control flow statement that allows code to be executed repeatedly as long as a condition is true. The syntax for a while loop is as follows:
while (condition) {
// code to be executed repeatedly
}
The condition is evaluated before the code inside the loop is executed. If the condition is true, the code inside the loop is executed. After the code inside the loop is executed, the condition is evaluated again. This process continues until the condition is false.
For example, the following code prints the numbers from 1 to 10:
int i = 1;
while (i <= 10) {
System.out.println(i);
i++;
}
The while loop is a very common control flow statement. It is used in many different programming languages.
The other options are incorrect because they do not describe the behavior of a while loop.
- Option B,
do while, is similar to a while loop, but the condition is checked at the end of the loop instead of the beginning. This means that the code inside the loop will always be executed at least once. - Option C,
if condition, is a control flow statement that allows code to be executed if a condition is true. The syntax for an if statement is as follows:
if (condition) {
// code to be executed if the condition is true
}
- Option D,
nested, is a term used to describe a loop that is contained within another loop. For example, the following code contains a nested loop:
for (int i = 0; i < 10; i++) {
for (int j = 0; j < 5; j++) {
System.out.println(i + " " + j);
}
}
The inner loop is executed 10 times, and the outer loop is executed 5 times. This means that the code inside the inner loop is executed 50 times.