In a login system, attempts are allowed up to 3 times, and the system must prompt the user at least once before checking the condition. Which type of loop is best suited for this scenario?

What is the output of the following C program? #include int main() { int index; for (index = 1; index ≤ 5; index++) { printf("%d", index); if (index == 3) continue; } }

What is the key difference between the working of 'while' and 'do-while' loops in C?