What are the differences between for, while, and do-while loops in Java?

What are the differences between for, while, and do-while loops in Java?

In Java, a 'for' loop is used when the number of iterations is known, while a 'while' loop continues until a condition is false. A 'do-while' loop is similar to a 'while' loop, but it guarantees at least one execution of the loop body.

Can you give me an example of each loop?

Sure! Here's a simple example:

1. For loop:

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

2. While loop:

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

3. Do-while loop:

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

What are the advantages of using one loop over the others?

The 'for' loop is great for a known number of iterations, making it concise. The 'while' loop is flexible for unknown iterations, while the 'do-while' loop ensures the code runs at least once, which is useful for user input scenarios.

Are there any performance differences between these loops?

In most cases, the performance differences are negligible, as they compile down to similar bytecode. However, choosing the right loop can improve code readability and maintainability.