Different types of loops.

. When to Use for vs. while Loops:

• for Loop:
  • Use a for loop when you know in advance how many times you need to iterate.
  • It's ideal for iterating over a sequence (like a list, tuple, string, or range) or any iterable object.
  • Examples:
    • Processing each item in a list.
    • Repeating an action a specific number of times.
    • Traversing the characters in a string.
• while Loop:
  • Use a while loop when you need to repeat a block of code until a certain condition is met.
  • The number of iterations is not known beforehand.
  • Examples:
    • Repeating an action until a user enters a specific input.
    • Continuing a process until a calculation reaches a desired value.
    • Creating a game loop that runs until the player loses.

2. How to Include Loop Structures in Python:

• for Loop:
  • The for loop uses the for keyword, followed by a variable name, the in keyword, and the iterable object.
  • Syntax: for variable in iterable:
• while Loop:
  • The while loop uses the while keyword, followed by a condition.
  • Syntax: while condition:

3. How to Control a Loop:

• break Statement:
  • The break statement immediately terminates the loop, regardless of whether the loop's condition is still true.
  • It's often used to exit a loop when a specific condition is met within the loop's body.
• continue Statement:
  • The continue statement skips the rest of the current iteration and moves to the next iteration of the loop.
  • It's useful for skipping certain iterations based on specific conditions.
• Loop Control Variable:
  • In a while loop, the condition that controls the loop must eventually become false. This is typically done by modifying a variable that is part of the conditional statement.
  • In a for loop, the loop control is managed by the iterable object.

4. Sample Code Demonstrations:

# for loop example: iterating over a list
fruits = ["apple", "banana", "cherry"]
for fruit in fruits:
    print(fruit)

# for loop example: using range() to repeat a task
for i in range(5):  # range(5) generates numbers 0, 1, 2, 3, 4
    print("Iteration:", i)

# while loop example: repeating until a condition is met
count = 0
while count < 5:
    print("Count:", count)
    count += 1

# while loop example: with user input and break
while True:
    user_input = input("Enter 'exit' to quit: ")
    if user_input.lower() == "exit":
        break
    print("You entered:", user_input)

# for loop example: with continue
for i in range(10):
    if i % 2 == 0:  # Skip even numbers
        continue
    print("Odd number:", i)

# while loop example with break
number = 0
while number <10:
    number += 1
    if number == 5:
        break;
    print(number)

Key takeaways from the examples:

• The for loop is excellent for iterating through collections.
• The range() function is very useful to create a sequence of numbers for a for loop.
• The while loop continues as long as its condition remains true.
• break and continue provide fine-grained control over loop execution.
• It is critical to be sure that while loops will eventually end.

Sample Solution