Difference Between While And Do While Loop In Java
distinguishing between while and do while loops in Java
Difference Between While And Do While Loop In Java
In Java, the main difference between a while loop and a do-while loop lies in when the condition is evaluated. In a while loop, the condition is evaluated before the loop body executes, meaning the loop may not run at all if the condition is false from the start. On the other hand, a do-while loop first executes the loop body and then evaluates the condition, ensuring that the loop body runs at least once regardless of the condition. This means that a do-while loop is useful when you want to perform a task at least once before checking the condition for repetition, whereas a while loop is more suitable when you want the condition to be checked before the loop body is executed.
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1 - In Java, the main difference between a while loop and a do while loop lies in their evaluation order.
2) In a while loop, the condition is evaluated before the execution of the loop statements. If the condition is false initially, the loop statements are never executed.
3) On the other hand, in a do while loop, the loop statements are always executed at least once before checking the condition.
4) The do while loop guarantees the execution of the loop body at least once, while the while loop may skip the execution of the loop body if the condition is initially false.
5) The while loop is entry controlled, meaning that the condition is checked before entering the loop, while the do while loop is exit controlled, as it checks the condition after executing the loop body.
6) Due to this difference, the do while loop is useful when you want to execute the loop body at least once, regardless of the condition.
7) Both while and do while loops can be used for repetitive tasks, but the do while loop provides a way to ensure that the loop body is executed before checking the condition.
8) Understanding the distinction between while and do while loops is important for writing efficient and logic driven code in Java.
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