Basic C Programming - Loop Concepts

What is the syntax of a while loop in C?

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

• while{condition} // code to be executed

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

• while(condition) // code to be executed

When is the do while loop in C useful?

• When you want to execute the loop body based on a condition after the loop body

• When you want to execute the loop body a fixed number of times

• When you want to execute the loop body only if the condition is true

• When you want to execute the loop body at least once before checking the loop condition.

How is the initialization done in a for loop in C?

• By specifying an initial value for the loop control variable inside the parentheses after the keyword 'for'.

• By assigning a value to the loop control variable after the loop

• By declaring the loop control variable outside the loop

• By using a separate initialization statement before the loop

What are loop control statements in C?

• skip

• 'break', 'continue', and 'goto' are loop control statements in C.

• jump

• pause

Explain the concept of nested loops in C.

• Nested loops in C are only used for simple tasks

• Nested loops in C are achieved by having loops that are not related to each other

• Nested loops in C are used to execute code sequentially

• Nested loops in C are achieved by having one loop inside another loop. The inner loop will complete all its iterations for each iteration of the outer loop.

How do you exit a loop prematurely in C?

• terminate

• stop

• end

• break

What is the difference between while and do while loop in C?

• while loop executes the block of code before checking the condition

• do while loop checks the condition before executing the block of code

• while loop checks the condition before executing the block of code, whereas do while loop executes the block of code at least once before checking the condition.

• while loop always executes the block of code at least once

What is the purpose of the continue statement in a loop?

• To restart the loop from the beginning

• To print a message and terminate the loop

• To skip the current iteration and move to the next iteration

• To end the loop immediately

Give an example of a nested loop in C.

• for(int i = 0; i < 3; i++) { for(int j = 0; j < 5; j++) { printf("(%d, %d) ", i, j); } }

• for(int i = 0; i < 5; i++) { for(int j = 0; j < 5; j++) { printf("(%d, %d) ", i, j); } }

• for(int i = 0; i < 5; i++) { for(int j = 0; j < 3; j++) { printf("(%d, %d) ", i, j); } }

• for(int i = 0; i < 5; i++) { for(int j = 0; j < 3; j++) { printf("(%d, %d) ", j, i); } }

How do you prevent an infinite loop in C?

• Use a while loop instead of a for loop

• Remove the condition from the loop

• Increase the loop counter by a large number

• Use a condition within the loop that will eventually evaluate to false, such as incrementing a counter variable or using a break statement.