While Loop

A while loop repeats while its condition remains true.

while_loop.cpp

#include <iostream>

int main() {
    int start = ;
    int current = start;
    int total = 0;

    while (current > 0) {
        total += current;
        current--;
    }

    std::cout << "start=" << start << std::endl;
    std::cout << "total=" << total << std::endl;
    return 0;
}

#include <iostream>

int main() {
    int start = ;
    int current = start;
    int total = 0;

    while (current > 0) {
        total += current;
        current--;
    }

    std::cout << "start=" << start << std::endl;
    std::cout << "total=" << total << std::endl;
    return 0;
}

#include <iostream>

int main() {
    int start = ;
    int current = start;
    int total = 0;

    while (current > 0) {
        total += current;
        current--;
    }

    std::cout << "start=" << start << std::endl;
    std::cout << "total=" << total << std::endl;
    return 0;
}

while A `while` loop checks the condition before each pass through the loop body.