C Programming Control Statements

What is the purpose of the 'if' statement in C?

• To declare variables in C.

• To create loops in C.

• To define a function in C.

• To execute code conditionally based on a boolean expression.

How does a 'switch' statement differ from multiple 'if' statements?

• A 'switch' statement can evaluate conditions based on ranges of values.

• Multiple 'if' statements are always faster than a 'switch' statement.

• A 'switch' statement can only handle boolean values.

• A 'switch' statement is more efficient and readable for handling multiple discrete values of a single variable compared to multiple 'if' statements.

What is the syntax for a 'for' loop in C?

• for(condition; initialization; increment/decrement) { // code }

• for(initialization: condition: increment/decrement) { // code }

• for(initialization; condition; increment/decrement) { // code to be executed }

• for(initialization; increment/decrement; condition) { // code }

Explain the use of the 'while' loop with an example.

• while (true) { System.out.println('Hello'); }

• Example: int count = 0; while (count < 5) { System.out.println(count); count++; } // This will print numbers 0 to 4.

• int count = 5; while (count > 0) { System.out.println(count); count--; }

• int count = 0; for (count < 5; count++) { System.out.println(count); }

What will be the output of the following code: 'for(int i=0; i<5; i++) printf("%d ", i);'?

• 0 1 2 3

• 0 1 2 3 4

• 1 2 3 4 5

• 0 1 2 3 4 5

Describe the difference between 'do..while' and 'while' loops.

• 'do..while' loops can only execute once.

• Both loops check the condition before execution.

• The main difference is that 'while' checks the condition before execution, while 'do..while' checks it after, guaranteeing at least one execution.

• 'while' loops guarantee at least one execution.

What happens if the condition in a 'while' loop is never true?

• The loop will skip to the next iteration.

• The loop will not execute.

• The loop will execute indefinitely.

• The loop will execute once.

Can a 'switch' statement have a default case?

• A 'switch' statement can only have one case.

• No, a 'switch' statement cannot have a default case.

• The default case is mandatory in a 'switch' statement.

• Yes, a 'switch' statement can have a default case.

How do you break out of a loop in C?

• Use the 'continue' statement.

• Use the 'break' statement.

• Use the 'exit' function.

• Use the 'return' statement.

What is the result of using 'continue' in a loop?

• It ends the loop immediately.

• It skips the rest of the loop body for the current iteration.

• It pauses the loop for a specified time.

• It restarts the loop from the beginning.