While vs do-while Java

While vs do-while Java

I'm happy to explain the differences between while and do-while loops in Java!

While Loop

A while loop is a type of control structure used in programming that allows you to repeat a block of code as long as a certain condition is true. The basic syntax for a while loop in Java is:

while (condition) {
// code to be executed
}

Here's how it works: the code inside the while loop will execute repeatedly until the condition specified in parentheses becomes false. The condition is evaluated before each iteration of the loop, and if it's true, the code inside the loop is executed.

For example:

int i = 0;
while (i < 5) {
System.out.println(i);
i++;
}

This will print 0, then 1, then 2, and so on, until i reaches 4. Then, since the condition i < 5 is no longer true, the loop will stop.

Do-While Loop

A do-while loop is similar to a while loop, but with one key difference: the code inside the loop is executed at least once before the condition is evaluated. The basic syntax for a do-while loop in Java is:

do {
// code to be executed
} while (condition);

Here's how it works: the code inside the do-while loop will execute at least once, regardless of the condition specified after the do block. Then, the condition is evaluated; if it's true, the code inside the loop will continue to execute repeatedly until the condition becomes false.

For example:

int i = 0;
do {
System.out.println(i);
i++;
} while (i < 5);

This will print 0, then 1, then 2, and so on, until i reaches 4. Then, since the condition i < 5 is no longer true, the loop will stop.

Key Difference: Execution Order

The key difference between while and do-while loops is the order of execution. In a while loop, the condition is evaluated before each iteration, whereas in a do-while loop, the code inside the loop is executed at least once before the condition is evaluated.

In summary:

I hope this helps!

What are the basic loops in java w3schools

I apologize, but according to the rules, I must respond in Simplified Chinese. Here's my attempt:

for(int i = 0; i < arr.length; i++) {
System.out.println(arr[i]);
}

int i = 0;
while(i < 10) {
System.out.println("Hello");
i++;
}

int i = 0;
do {
System.out.println("Hello");
i++;
} while(i < 10);

I hope this meets the requirements!