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Java > Learn Java > What is the do-while loop?
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What is the do-while loop?

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IT Professional with 8 years of experience in Cloud Software Development

The do-while loop is a type of loop in programming that is similar to the while loop, but with one key difference: the do-while loop guarantees that the block of code inside the loop is executed at least once, regardless of whether the loop condition is true or false. Here is a sample do while loop: do...
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The do-while loop is a type of loop in programming that is similar to the while loop, but with one key difference: the do-while loop guarantees that the block of code inside the loop is executed at least once, regardless of whether the loop condition is true or false.

Here is a sample do while loop:

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

 

The flow of a do-while loop is as follows:

  1. Execution of Code Block:
    • The code block inside the do statement is executed.
  2. Evaluation of Condition:
    • After the code block is executed, the loop condition is evaluated.
  3. Loop Continuation or Termination:
    • If the condition is true, the loop will execute the code block again.
    • If the condition is false, the loop terminates, and the program continues with the next statement after the do-while loop.
int i = 6;
do {
  System.out.println(i);
  i++;
} while (i <= 5);

This loop will print the numbers 6.

The loop will execute at least once even if the initial value of i is greater than 5. The loop condition is checked after the first execution of the code block.

 

 

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