A condition-controlled loop, also known as a "conditional loop" or "while loop," is a type of loop construct in programming that repeatedly executes a block of code as long as a specified condition is true.

The loop continues to execute as long as the condition remains true, and it terminates as soon as the condition becomes false.

The basic structure of a condition-controlled loop is as follows:

while (condition) {
    // Code to be executed repeatedly while the condition is true
}

Here's how a condition-controlled loop works:

• The condition is evaluated before the loop is entered. If the condition is true, the code inside the loop is executed. If the condition is false initially, the loop is skipped entirely, and the program continues with the next statement after the loop.

• After executing the code inside the loop, the condition is re-evaluated. If the condition is still true, the loop iterates and executes the code again. This process continues until the condition becomes false.

• Once the condition becomes false, the loop exits, and the program continues with the next statement after the loop.

Condition-controlled loops are commonly used when the number of iterations is not known in advance and is dependent on some condition or variable. These loops are useful for performing repetitive tasks until a certain condition is met or a specific event occurs. Examples of condition-controlled loops include iterating through a list of elements, reading data from a file until the end of the file is reached, or validating user input until valid input is received.

One important consideration when using a condition-controlled loop is to ensure that the loop condition will eventually become false at some point during the execution of the loop. Otherwise, the loop will continue indefinitely, leading to an infinite loop and potentially causing the program to hang or crash. To avoid infinite loops, it's crucial to design the loop condition carefully and ensure that it is properly updated within the loop body.