Exploring Iteration in Programming

What is a for loop used for in programming?

• A for loop is used for error handling in code.

• A for loop is used to define a function.

• A for loop is used for iterating over a sequence to execute code multiple times.

• A for loop is used to declare variables.

How do you define a for loop in Python?

• for variable in iterable:

• for (variable : iterable) { }

• foreach variable in iterable:

• for variable in range(iterable):

What is the output of the following code: for i in range(5): print(i)?

• 10

• -1

• 5

• 0 1 2 3 4

Explain the difference between a for loop and a while loop.

• A for loop iterates a known number of times, while a while loop continues until a condition is false.

• A for loop runs indefinitely, while a while loop has a fixed number of iterations.

• A for loop can only be used with arrays, while a while loop can be used with any data type.

• A for loop is used for conditional statements, while a while loop is used for data structures.

What is the syntax for a while loop in Java?

• while (condition) { // code to be executed }

• while { condition } // code to be executed

• while (condition) // code to be executed }

• while (condition) { code to be executed }

How many times will the following while loop execute: int i = 0; while(i < 3) { i++; }?

• 5

• 4

• 3

• 2

What will be the output of the following code: for (int i = 0; i < 3; i++) { System.out.print(i); }?

• 012

• 123

• 0123

• 00

In which scenario would you prefer a while loop over a for loop?

• When the number of iterations is fixed and known beforehand.

• When you need to iterate over a collection of items.

• When performance is the primary concern.

• When the number of iterations is unknown and depends on a condition.

What is an infinite loop? Give an example using a while loop.

• while (x < 10) { console.log('This will run until x is 10'); }

• while (false) { console.log('This will run once'); }

• while (1) { console.log('This will run a few times'); }

• while (true) { console.log('This will run forever'); }

How can you exit a loop prematurely in Python?

• Raise an exception to stop the loop execution.

• Use the 'break' statement to exit a loop prematurely.

• Use the 'continue' statement to exit a loop prematurely.

• Use the 'return' statement to exit the loop.