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A while loop repeatedly runs a block of code as long as the condition is true. Once the condition becomes false, the loop stops. This type of loop is useful when the number of iterations is not known beforehand.
int password;
std::cout << "Enter your password: ";
std::cin >> password;
// The loop keeps asking for the password until the user enters 1234
while (password != 1234) {
std::cout << "Incorrect. Try again: ";
std::cin >> password;
}
std::cout << "Access granted.";
A for loop is used when the number of times to execute the code block is known. It is useful for iterating over a range of values or running a set of instructions a specific number of times.
// Loop from 0 to 9 and print each number
for (int i = 0; i < 10; i++) {
std::cout << i << "\n";
}
std::cout << "Loop complete.";
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