C Programming: Control Structures, Loops, and Conditional Statements

For Quiz 2 of Intro to C

What is the purpose of an if statement in C?

To execute a block of code conditionally based on whether a boolean expression is true.

What is short-circuiting in the context of if statements?

It refers to the evaluation of boolean expressions where evaluation stops as soon as the result is determined.

What is the syntax for a basic if statement in C?

if (boolean expression) { statement; }

What does the else statement do in C?

It provides an alternative block of code to execute if the preceding if statement's condition is false.

How can multiple conditions be handled in C?

Using else if statements to check additional conditions after the initial if statement.

What is the purpose of curly braces in if statements?

To define a block of code that should be executed if the condition is true, allowing for multiple statements.

What is a while loop used for in C?

To repeatedly execute a block of code as long as a specified boolean expression evaluates to true.

What is the structure of a while loop in C?

while (boolean expression) { statements; }

What is the purpose of a for loop in C?

To execute a block of code a specific number of times, defined by initialization, condition, and increment.

What is the syntax for a for loop in C?

for (initialization; condition; increment) { statements; }

What is an accumulator variable?

A variable used to keep a running total or sum, often updated within loops.

What does the break statement do in a loop?

It immediately exits the loop, skipping any remaining iterations.

What does the continue statement do in a loop?

It skips the current iteration and continues with the next iteration of the loop.

What is a do-while loop?

A loop that executes its block of code at least once before checking the boolean expression.

What is the syntax for a do-while loop in C?

do { statements; } while (boolean expression);

What is the significance of perfect numbers in programming?

Perfect numbers are integers that are equal to the sum of their proper divisors, often used in mathematical programming examples.

What is the purpose of input validation in loops?

To ensure that user input meets certain criteria before proceeding with further processing.

What is the role of the variable 'ctr' in a for loop?

It serves as a counter to keep track of the number of iterations.

What is the difference between while and for loops?

While loops are generally used for indefinite iteration, while for loops are used for a specific number of iterations.

What is an example of shorthand for updating a variable in C?

Using 'var += expr;' to add 'expr' to 'var'.