How do you choose which loop to use?

When to Use Each Loop

1. Use a for loop to iterate over an array.
2. Use a for loop when you know the loop should execute n times.
3. Use a while loop for reading a file into a variable.
4. Use a while loop when asking for user input.
5. Use a while loop when the increment value is nonstandard.

What is the use of while loop?

In most computer programming languages, a while loop is a control flow statement that allows code to be executed repeatedly based on a given Boolean condition.

Which loop is guaranteed to execute at least one time * For while do while none of the above?

The do-while is also called the exit control loop because it checks the condition in the exit time. In the do-while loop at least once a time the instruction will be executed. So when we have to need to execute the instruction at least once then do-while will be used.

Does a while loop execute at least once?

while statement creates a loop that executes a specified statement until the test condition evaluates to false. The condition is evaluated after executing the statement, resulting in the specified statement executing at least once.

When we use do-while loop?

Using the do-while loop, we can repeat the execution of several parts of the statements. The do-while loop is mainly used in the case where we need to execute the loop at least once. The do-while loop is mostly used in menu-driven programs where the termination condition depends upon the end user.

What is the use of DO WHILE LOOP?

The do while loop is an exit controlled loop, where even if the test condition is false, the loop body will be executed at least once. An example of such a scenario would be when you want to exit your program depending on the user input.

What are the different types of looping statements in C?

Depending upon the position of a control statement in a program, looping statement in C is classified into two types: 1. Entry controlled loop 2. Exit controlled loop In an entry control loop in C, a condition is checked before executing the body of a loop.

What happens when the condition is true in a loop?

If the condition is true, then it will again execute the body of a loop otherwise control is transferred out of the loop. Similar to the while loop, once the control goes out of the loop the statements which are immediately after the loop is executed.

What are the advantages and disadvantages of a while loop?

The advantage to a while loop is that it will go (repeat) as often as necessary to accomplish its goal. If the action inside the loop does not modify the variables being tested in the loops condition, the loop will “run” forever. For example: Ask the user to input a value. while the input is incorrect.