Cpp While Loop

C++ while loop

Created By: chatGPT

While loops are control flow statements that allow code to be executed repeatedly based on a given Boolean condition. In C++, the while loop checks the condition before executing the loop's body. Here's a simple structure of a while loop:

while (condition) {
    // Code to execute repeatedly
}

Let's look at an example where we want to print numbers from 1 to 5 using a while loop. We'll initialize a variable, check the condition, and print the number while incrementing it in each iteration.

int number = 1;

while (number <= 5) {
    std::cout << number << std::endl;
    number++;
}

In this code snippet, we start with number set to 1. The loop continues as long as number is less than or equal to 5. After printing the value of number, we increment it by 1 in each iteration, which eventually leads the loop to terminate once number exceeds 5.

#include <iostream>

int main() {
    int number = 1;

    while (number <= 5) {
        std::cout << number << std::endl;
        number++;
    }
    return 0;
}

While using loops, especially in real-world applications, it's important to ensure that the loop will eventually terminate. Failing to do so might lead to an infinite loop, which can freeze a program or consume system resources excessively.

// Infinite while loop example (be careful)
while (true) {
    std::cout << "This will run forever!" << std::endl;
}

To prevent infinite loops, one common approach is to carefully manage your loop condition and ensure that a variable that affects the condition is correctly modified within the loop. Here's how you might do that:

int count = 0;

while (count < 10) {
    std::cout << "Count: " << count << std::endl;
    count++;
}