C++ while loop is the simplest loop. It executed its statements repeatedly until the given condition remains true. As the condition becomes false the while loop will be terminated and control goes to the statements just after the while loop.
Syntax: while loop in C++
While (condition)
{
Statements;
}Working: while loop in C++
In a while loop, first of all, the condition is evaluated. If the condition is true, the control is transferred inside the body of the while loop and executes all statements inside it. After that, the control again moves to the beginning of the while loop and evaluates the condition again. This looping process continues until the condition remains true. When the condition becomes false, the loop is terminated and control is shifted to the statements followed by the while loop.
Flow Chart: While loop
Example: C++ While Loop
//while loop in C++
#include <iostream>
using namespace std;
int main()
{
int i = 0;
while (i < 10) {
cout <<"Hello World: "<< i <<endl;
i++;
}
return 0;
} Output
Hello World: 0
Hello World: 1
Hello World: 2
Hello World: 3
Hello World: 4
Hello World: 5
Hello World: 6
Hello World: 7
Hello World: 8
Hello World: 9