Understanding Loops in Programming

What is a loop in programming?

• A function that returns a value

• A programming construct that repeats a block of code until a specified condition is met

• A way to display output

• A way to store variables

What are the types of loops in C++?

• For, While, Do-while

• Repeat, Until, Loop

• If, Else, For

• Do, While, Repeat

What does this for loop do? for (int i = 1; i <= 5; i++) { cout << i << endl; }

• Prints numbers from 1 to 6

• Prints numbers from 1 to 5

• Prints 5 lines of text

• Prints numbers from 0 to 5

How does a while loop work?

• It runs indefinitely regardless of the condition

• It checks the condition after the loop body executes

• It checks the condition before executing the loop body

• It runs for a fixed number of times

What does this do-while loop do? int i = 1; do { cout << i << endl; i++; } while (i <= 5);

• Prints numbers from 1 to 4

• Prints numbers from 1 to 5

• Prints 5 lines of text

• Prints numbers from 0 to 5

What is the difference between a while loop and a do-while loop?

• The while loop is faster

• The do-while loop runs at least once before checking the condition

• The while loop checks the condition after each iteration

• There is no difference

What does this code do? int sum = 0; for (int i = 1; i <= 10; i++) { sum += i; } cout << "Sum: " << sum << endl;

• Prints the sum of numbers from 1 to 9

• Prints the sum of numbers from 1 to 10

• Prints the numbers from 1 to 10

• Prints the sum of numbers from 0 to 10

How can you terminate a loop prematurely in C++?

• By using the exit() function

• By using the end() function

• By using the break statement

• By using the terminate() function

What does the continue statement do in a loop?

• Terminates the loop

• Skips the current iteration and moves to the next one

• Causes an infinite loop

• Exits the program

What will the following loop output? for (int i = 1; i <= 5; i++) { if (i % 2 == 0) { cout << i << " is even." << endl; } else { cout << i << " is odd." << endl; } }

• It will print "1 is even", "2 is odd", etc.

• It will print numbers 1 through 5 without even or odd labels

• It will print "1 is odd", "2 is even", etc.

• It will print "1 is odd", "2 is even", and other numbers in the sequence