Do-While loop is similar to the while loop.when a set of statements have to be repeatedly executed at least once untile a certain condition is reached. When we do not know exactly how many time a set of statement have to be repeated do while can be used.
Syntex :-
do {
// Statements
}while(Boolean_expression);
How Do-While Loop Works in C++.
step 1:-
The initialization statement is executed first.
step 2:-
Then, the test expression is evaluated. If the test expression is evaluated to false, then the while loop gets terminated and the control comes out of the while loop.
step 3:-
if the test expression is evaluated to true,The statements defined inside the while loop will repeatedly execute until the given condition fails.
step 4:-
After successful execution of statements inside the body of the while loop, the update expression is executed.
step 5:-
Again the test expression is evaluated.
Q.) Example of do-while loop in C++ .
#include < iostream>
using namespace std;
int main() {
// Local variable
int y = 1;
do {
cout << "y is: " << y << endl;
y = y + 1;
} while (y < 5);
return 0;
}
